Готові списки джерел за темами / Slow component of VO2

Добірка наукової літератури з теми "Slow component of VO2"

Автор: Grafiati
Опубліковано: 18 жовтня 2022

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Статті в журналах з теми "Slow component of VO2":

1

Fontana, Federico Y., Giorgia Spigolon, and Silvia Pogliaghi. "VO2 Slow Component." Medicine & Science in Sports & Exercise 48 (May 2016): 200. http://dx.doi.org/10.1249/01.mss.0000485602.73906.88.

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2

Wasserman, K. "Coupling of external to cellular respiration during exercise: the wisdom of the body revisited." American Journal of Physiology-Endocrinology and Metabolism 266, no. 4 (April 1, 1994): E519—E539. http://dx.doi.org/10.1152/ajpendo.1994.266.4.e519.

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The changes in cellular respiration needed to increase energy output during exercise are intimately and predictably linked to external respiration through the circulation. This review addresses the mechanisms by which lactate accumulation might influence O2 uptake (VO2) and CO2 output (VCO2) kinetics. Respiratory homeostasis (a steady state with respect to VO2 and VCO2) is achieved by 3-4 min for work rates not associated with an increase in arterial lactate. When blood lactate increases significantly above rest for constant work rate exercise, VO2 characteristically increases past 3 min (slow component) at a rate proportional to the lactate concentration increase. The development of a similar slow component in VCO2 is not evident. The divergence of VCO2 from VO2 increase can be accounted for by extra CO2 release from the cell as HCO3- buffers lactic acid. Thus the slow component of aerobic CO2 production (parallel to VO2) is masked by the increase in buffer VCO2. This CO2, and the consumption of extracellular HCO3- by the lactate-producing cells, shifts the oxyhemoglobin dissociation curve rightward (Bohr effect). The exercise lactic acidosis has been observed to occur after the minimal capillary PO2 is reached. Thus the lactic acidosis serves to facilitate oxyhemoglobin dissociation and O2 transport to the muscle cells without a further decrease in end-capillary PO2. From these observations, it is hypothesized that simultaneously measured dynamic changes in VO2 and VCO2 might be useful to infer the aerobic and anaerobic contributions to exercise bioenergetics for a specific work task.
3

Colosio, Alessandro L., Kevin Caen, Jan G. Bourgois, Jan Boone, and Silvia Pogliaghi. "Bioenergetics of the VO2 slow component between exercise intensity domains." Pflügers Archiv - European Journal of Physiology 472, no. 10 (July 14, 2020): 1447–56. http://dx.doi.org/10.1007/s00424-020-02437-7.

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Abstract During heavy and severe constant-load exercise, VO2 displays a slow component (VO2sc) typically interpreted as a loss of efficiency of locomotion. In the ongoing debate on the underpinnings of the VO2sc, recent studies suggested that VO2sc could be attributed to a prolonged shift in energetic sources rather than loss of efficiency. We tested the hypothesis that the total cost of cycling, accounting for aerobic and anaerobic energy sources, is affected by time during metabolic transitions in different intensity domains. Eight active men performed 3 constant load trials of 3, 6, and 9 min in the moderate, heavy, and severe domains (i.e., respectively below, between, and above the two ventilatory thresholds). VO2, VO2 of ventilation and lactate accumulation ([La−]) were quantified to calculate the adjusted oxygen cost of exercise (AdjO2Eq, i.e., measured VO2 − VO2 of ventilation + VO2 equivalent of [La−]) for the 0–3, 3–6, and 6–9 time segments at each intensity, and compared by a two-way RM-ANOVA (time × intensity). After the transient phase, AdjO2Eq was unaffected by time in moderate (ml*3 min−1 at 0–3, 0–6, 0–9 min: 2126 ± 939 < 2687 ± 1036, 2731 ± 1035) and heavy (4278 ± 1074 < 5121 ± 1268, 5225 ± 1123) while a significant effect of time was detected in the severe only (5863 ± 1413 < 7061 ± 1516 < 7372 ± 1443). The emergence of the VO2sc was explained by a prolonged shift between aerobic and anaerobic energy sources in heavy (VO2 − VO2 of ventilation: ml*3 min−1 at 0–3, 0–6, 0–9 min: 3769 ± 1128 < 4938 ± 1256, 5091 ± 1123, [La−]: 452 ± 254 < 128 ± 169, 79 ± 135), while a prolonged metabolic shift and a true loss of efficiency explained the emergence of the VO2sc in severe.
4

Womack, C. J., S. E. Davis, J. L. Blumer, E. Barrett, A. L. Weltman, and G. A. Gaesser. "Slow component of O2 uptake during heavy exercise: adaptation to endurance training." Journal of Applied Physiology 79, no. 3 (September 1, 1995): 838–45. http://dx.doi.org/10.1152/jappl.1995.79.3.838.

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Seven untrained male subjects [age 25.6 +/- 1.5 (SE) yr, peak O2 uptake (VO2) 3.20 +/- 0.19 l/min] trained on a cycle ergometer 4 days/wk for 6 wk, with the absolute training workload held constant for the duration of training. Before and at the end of each week of training, the subjects performed 20 min of constant-power exercise at a power designed to elicit a pronounced slow component of VO2 (end-exercise VO2-VO2 at minute 3 of exercise) in the pretraining session. An additional 20-min exercise bout was performed after training at this same absolute power output during which epinephrine (Epi) was infused at a rate of 100 ng.kg-1.min-1 between minutes 10 and 20. After 2 wk of training, significant decreases in VO2 slow component, end-exercise VO2, blood lactate ([La-] and glucose concentrations, plasma Epi ([Epi]) and norepinephrine concentrations, ventilation (VE), and heart rate (HR) were observed (P < 0.05). Although the rapid attenuation of the VO2 slow component coincided temporally with reductions in plasma [Epi], blood [La-], and VE, the infusion of Epi after training significantly increased plasma [Epi] (delta 2.22 ng/ml), blood [La-] (delta 2.4 mmol/l) and VE (delta 10.0 l/min) without any change in exercise VO2. We therefore conclude that diminution of the VO2 slow component with training is attributable to factors other than the reduction in plasma [Epi], blood [La-] and VE.
5

Billat, V. L. "VO2 slow component and performance in endurance sports." British Journal of Sports Medicine 34, no. 2 (April 1, 2000): 83–85. http://dx.doi.org/10.1136/bjsm.34.2.83.

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6

Lucia, A. "The slow component of VO2 in professional cyclists." British Journal of Sports Medicine 34, no. 5 (October 1, 2000): 367–74. http://dx.doi.org/10.1136/bjsm.34.5.367.

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7

Jones, A. "VO2 slow component and performance in endurance sports." British Journal of Sports Medicine 34, no. 6 (December 1, 2000): 473. http://dx.doi.org/10.1136/bjsm.34.6.473.

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8

Heck, Kristen L., Jeffrey A. Potteiger, Karen L. Nau, and Jan M. Schroeder. "Sodium Bicarbonate Ingestion Does Not Attenuate the VO2 Slow Component during Constant-Load Exercise." International Journal of Sport Nutrition 8, no. 1 (March 1998): 60–69. http://dx.doi.org/10.1123/ijsn.8.1.60.

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We examined the effects of sodium bicarbonate ingestion on the VO2 slow component during constant-load exercise. Twelve physically active males performed two 30-min cycling trials at an intensity above the lactate threshold. Subjects ingested either sodium bicarbonate (BIC) or placebo (PLC) in a randomized. counterbalanced order. Arterialized capillary blood samples were analyzed for pH, bicarbonate concentration ([HCO3−), and lactate concentration ([La]). Expired gas samples were analyzed for oxygen consumption (VO2). The VO2 slow component was defined as the change in VO2 from Minutes 3 and 4 to Minutes 28 and 29. Values for pH and [HCO3−] were significantly higher for BIC compared to PLC. There was no significant difference in [La] between conditions. For both conditions there was a significant time effect for VO2 during exercise: however, no significant difference was observed between BIC and PLC. While extracellular acid-base measures were altered during the BIC trial, sodium bicarbonate ingestion did not attenuate the VO2 slow component during constant-load exercise.
9

Poole, D. C., W. Schaffartzik, D. R. Knight, T. Derion, B. Kennedy, H. J. Guy, R. Prediletto, and P. D. Wagner. "Contribution of excising legs to the slow component of oxygen uptake kinetics in humans." Journal of Applied Physiology 71, no. 4 (October 1, 1991): 1245–60. http://dx.doi.org/10.1152/jappl.1991.71.4.1245.

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Rates of performing work that engender a sustained lactic acidosis evidence a slow component of pulmonary O2 uptake (VO2) kinetics. This slow component delays or obviates the attainment of a stable VO2 and elevates VO2 above that predicted from considerations of work rate. The mechanistic basis for this slow component is obscure. Competing hypotheses depend on its origin within either the exercising limbs or the rest of the body. To resolve this question, six healthy males performed light nonfatiguing [approximately 50% maximal O2 uptake (VO2max)] and severe fatiguing cycle ergometry, and simultaneous measurements were made of pulmonary VO2 and leg blood flow by thermodilution. Blood was sampled 1) from the femoral vein for O2 and CO2 pressures and O2 content, lactate, pH, epinephrine, norepinephrine, and potassium concentrations, and temperature and 2) from the radial artery for O2 and CO2 pressures, O2 content, lactate concentration, and pH. Two-leg VO2 was thus calculated as the product of 2 X blood flow and arteriovenous O2 difference. Blood pressure was measured in the radial artery and femoral vein. During light exercise, both pulmonary and leg VO2 remained stable from minute 3 to the end of exercise (26 min). In contrast, during severe exercise [295 +/- 10 (SE) W], pulmonary VO2 increased 19.8 +/- 2.4% (P less than 0.05) from minute 3 to fatigue (occurring on average at 20.8 min). Over the same period, leg VO2 increased by 24.2 +/- 5.2% (P less than 0.05). Increases of leg and pulmonary VO2 were highly correlated (r = 0.911), and augmented leg VO2 could account for 86% of the rise in pulmonary VO2.(ABSTRACT TRUNCATED AT 250 WORDS)
10

Fawkner, S. G., and N. Armstrong. "VO2 SLOW COMPONENT RELATIVE TO CRITICAL POWER IN CHILDREN." Medicine & Science in Sports & Exercise 34, no. 5 (May 2002): S86. http://dx.doi.org/10.1097/00005768-200205001-00481.

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Статті в журналах Дисертації

Дисертації з теми "Slow component of VO2":

1

Dobbins, Trevor D. "The VO2 slow component in endurance trained cyclists." Thesis, University of Chichester, 2001. http://eprints.chi.ac.uk/860/.

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Established models of endurance performance (Costill et al. (1973) Med Sci Sports 5(4): 248-252 and Coyle (1995) Ex. Sport Sci. Rev. 23:25-63) are based on the athlete's ability to maintain a fixed %V02peak, normally within the severe intensity domain, e.g. 88 %V02peak (exercise intensity domains being defined as; rest-moderate-heavy-severe-V02peak; Whipp (1994) Med. Sci. Sports Exerc. 26(11): 1319-13-26). The V02 slow component (V02SC) concept (Gaesser and Poole, 1996, Ex. Sport Sci. Rev. 24:35-70), which is based on observations from a healthy/sedentary populations', states that V02 continually increases within the severe intensity domain, and therefore undermines the validity of the performance models. This thesis examined the V02SC in an endurance trained cyclist population. Within the models, V02peak sets the ceiling for endurance performance. Current V02SC theory suggests that V02p"k assessment is protocol independent, as V02 continually increases within the severe intensity domain. This thesis demonstrated that V02peak was protocol dependent for 3 ramp protocols (35, 20 and 5 W.min-'), the V02SC being unable to generate a V02peak response from the 5 W.min-' protocol even though the subjects worked within the severe intensity domain. The V02SC definition states that V02 is elevated above values predicted from moderate intensity exercise at heavy, and increases continually, at severe exercise intensities. The endurance trained subjects demonstrated elevated steady state V02 responses at exercise intensities up to their endurance performance V02. This was within the severe intensity domain, thus validating the performance models for this subject population. The V02SC response in endurance trained cyclists differed from that previously observed for a sedentary/healthy population, therefore the currently accepted cause, increased fast twitch (FT) muscle fibre recruitment, may be questioned. Evidence from EMG studies suggest that muscle recruitment patterns differ between muscles, with increasing intensity (Green and Patla (1992) Med. Sci. Sports Ex. 24(1): 38-46). The recruitment patterns of three muscles were examined during incremental exercise to establish changes in both the magnitude of activation, and potential changes in fibre type recruitment (via the median frequency response). The pattern of muscle recruitment varied between both subjects and muscles. Changes in the recruitment patterns of a number of individual muscles were coincidental with the initiation of the V02SC. No coincidence between muscle fibre type recruitment (assessed via the EMG median frequency response) and the V02SC in endurance trained cyclists was observed. Therefore the V02SC may be due to changes in muscle recruitment patterns as well as FT fibre recruitment. The results of this thesis suggest that current models of endurance performance are valid for the endurance trained cyclist population studied, and that the V02SC concept should be redefined for this population. The V02SC response observed may be due to changes in muscle recruitment patterns and an increase in the number of motor units recruited, as median frequency EMG measures did not support the hypothesis that the V02SC is principally caused by an increased recruitment of FT muscle fibres.
2

Naouar, Neïla. "Oxygénation musculaire, EMG et fonction ventilatoire chez des sportifs porteurs d'hémoglobinopathie durant un exercice physique." Thesis, Amiens, 2021. http://www.theses.fr/2021AMIE0025.

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L'objectif de cette thèse était triple 1)- Etudier la fonction ventilatoire durant un exercice incrémental maximal et un exercice sous-maximal prolongé chez des sportifs porteurs de trait drépanocytaire (PTD) 2)- Etudier la performance de la fonction ventilatoire durant un exercice à charge constante chez des sujets ayant une β-thalassémie mineure, 3)- Evaluer l'adaptation physiologique durant un effort sous-maximal prolongé chez des sportifs atteints de drépanocytose hétérozygote. La première étude a montré que l'exercice incrémental maximal et l'exercice à charge constante induisent une fatigue spirométrique, de la force et de l'endurance des muscles respiratoires chez les sujets porteurs de trait drépanocytaire. L'exercice rectangulaire affecte de façon importante la force et l'endurance musculaire respiratoire que l'exercice triangulaire. La deuxième étude a montré par ailleurs, une altération de la performance de la fonction ventilatoire après la réalisation d'un exercice sous-maximal prolongé chez les sujets ayant une β-thalassémie mineure. Ainsi, une diminution importante de l'endurance des muscles respiratoires a été constatée chez ces individus pathologiques en réponse à l'exercice à charge constante par rapport aux sujets sains. Ces résultats confirment que les sujets ayant des hémoglobinopathies n'ont pas la capacité de maintenir des niveaux élevés de ventilation pendant un exercice physique intense. Ensuite, lors de la troisième étude, la détermination de la PMA a permis d'affirmer que la forme hétérozygote de la drépanocytose n'est pas un facteur limitant de l'aptitude physique aérobie maximale. L'adaptation à un effort sous-maximal, évaluée par la phase rapide est parfaitement normale chez les sujets ayant un trait drépanocytaire. Par contre, l'amplitude de la composante lente de VO2, plus élevée chez les PTD suggère que ces individus pathologiques se caractérisent par une mauvaise tolérance à l'effort. Cette élévation était corrélée avec l'HbO2 et HHb qui étaient stables durant l'effort. Cette stabilité confirme la génération du mécanisme de remodelage vasculaire chez les PTD en réponse à des problèmes hémorhéologiques produits par l'effort. Une augmentation précoce du RMS et une diminution linéaire de 25,63% de MPF corrélée avec HHb, ont été constatées durant l'effort chez les individus pathologiques par rapport aux sujets sans hémoglobinopathie, affirmant que la baisse de déformabilité des globules rouges dont sont signalés généralement les sujets porteurs de trait drépanocytaire bouleverse de façon accrue la microcirculation musculaire qui pourrait être responsable de la composante lente de VO2. Ces résultats montrent que les sujets ayant une hémoglobinopathie pourraient avoir une fonction ventilatoire moins performante durant un effort physique intense que les sujets sains. Également, ces individus pourraient avoir une fatigue musculaire périphérique plus importante que les sujets à hémoglobine normale et une oxygénation musculaire stable durant un exercice rectangulaire. Ils présentent une capacité aérobie et une tolérance à l'effort d'endurance, inférieures aux sujets sains durant un effort sous-maximal
The aim of this thesis was threefold 1)- To study the ventilatory function during a maximal incremental exercise and a prolonged submaximal exercise in athletes with sickle cell trait (SCT), 2)- To study the performance of the ventilatory function during a constant load exercise in subjects with minor β-thalassemia, 3)- Evaluate the physiological adaptation during prolonged submaximal exercise in athletes with heterozygous sickle cell disease. The first study showed that maximal incremental exercise and constant load exercise induce spirometric fatigue, and decreased strength and endurance of the respiratory muscles in subjects with sickle cell trait. Rectangular exercise significantly affects respiratory muscle strength and endurance than triangular exercise. The second study was showed an impairment of the performance of ventilatory function after performing prolonged submaximal exercise in subjects with minor β-thalassemia. Thus, a significant decrease in the endurance of the respiratory muscles was observed in these pathological individuals in response to constant load exercise compared to healthy subjects. These results confirm that hemoglobinopathic subjects do not have the ability to maintain high levels of ventilation during intense physical exercise. Then, in the third study, the determination of the MAP confirmed that the heterozygous form of sickle cell disease is not a limiting factor in maximal aerobic physical fitness. Adaptation to submaximal effort, assessed by the rapid phase, is perfectly normal in subjects with sickle cell trait. In contrast, the amplitude of the slow component of VO2, which is higher in SCT, suggests that these pathological individuals are characterized by weak tolerance to exercise. This rise was correlated with HbO2 and HHb which were satble during exercise. This stability confirms the generation of the vascular remodeling mechanism in SCT in response to hemorheological problems produced by exercise. An precocious increase in RMS and a 25.63% linear decrease in MPF correlated with HHb, were observed during exercise in pathologic individuals compared to subjects without hemoglobinopathy, affirming that the decrease in erythrocyte deformabilities which are generally reported in subjects with sickle cell trait disrupts the muscular microcirculation in an increased manner which could be responsible for the slow component of VO2. These results show that subjects with hemoglobinopathy could have a less efficient ventilatory function during intense physical exertion than healthy subjects. Also, these individuals might have more significant peripheral muscle fatigue than subjects with normal hemoglobin and stable muscle oxygenation during rectangular exercise. They exhibit aerobic capacity and tolerance to endurance effort inferior than healthy subjects during submaximal effort
3

Blaschke, Tobias. "Independent component analysis and slow feature analysis." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2005. http://dx.doi.org/10.18452/15270.

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Der Fokus dieser Dissertation liegt auf den Verbindungen zwischen ICA (Independent Component Analysis - Unabhängige Komponenten Analyse) und SFA (Slow Feature Analysis - Langsame Eigenschaften Analyse). Um einen Vergleich zwischen beiden Methoden zu ermöglichen wird CuBICA2, ein ICA Algorithmus basierend nur auf Statistik zweiter Ordnung, d.h. Kreuzkorrelationen, vorgestellt. Dieses Verfahren minimiert zeitverzögerte Korrelationen zwischen Signalkomponenten, um die statistische Abhängigkeit zwischen denselben zu reduzieren. Zusätzlich wird eine alternative SFA-Formulierung vorgestellt, die mit CuBICA2 verglichen werden kann. Im Falle linearer Gemische sind beide Methoden äquivalent falls nur eine einzige Zeitverzögerung berücksichtigt wird. Dieser Vergleich kann allerdings nicht auf mehrere Zeitverzögerungen erweitert werden. Für ICA lässt sich zwar eine einfache Erweiterung herleiten, aber ein ähnliche SFA-Erweiterung kann nicht im originären SFA-Sinne (SFA extrahiert die am langsamsten variierenden Signalkomponenten aus einem gegebenen Eingangssignal) interpretiert werden. Allerdings kann eine im SFA-Sinne sinnvolle Erweiterung hergeleitet werden, welche die enge Verbindung zwischen der Langsamkeit eines Signales (SFA) und der zeitlichen Vorhersehbarkeit desselben verdeutlich. Im Weiteren wird CuBICA2 und SFA kombiniert. Das Resultat kann aus zwei Perspektiven interpretiert werden. Vom ICA-Standpunkt aus führt die Kombination von CuBICA2 und SFA zu einem Algorithmus, der das Problem der nichtlinearen blinden Signalquellentrennung löst. Vom SFA-Standpunkt aus ist die Kombination eine Erweiterung der standard SFA. Die standard SFA extrahiert langsam variierende Signalkomponenten die untereinander unkorreliert sind, dass heißt statistisch unabhängig bis zur zweiten Ordnung. Die Integration von ICA führt nun zu Signalkomponenten die mehr oder weniger statistisch unabhängig sind.
Within this thesis, we focus on the relation between independent component analysis (ICA) and slow feature analysis (SFA). To allow a comparison between both methods we introduce CuBICA2, an ICA algorithm based on second-order statistics only, i.e.\ cross-correlations. In contrast to algorithms based on higher-order statistics not only instantaneous cross-correlations but also time-delayed cross correlations are considered for minimization. CuBICA2 requires signal components with auto-correlation like in SFA, and has the ability to separate source signal components that have a Gaussian distribution. Furthermore, we derive an alternative formulation of the SFA objective function and compare it with that of CuBICA2. In the case of a linear mixture the two methods are equivalent if a single time delay is taken into account. The comparison can not be extended to the case of several time delays. For ICA a straightforward extension can be derived, but a similar extension to SFA yields an objective function that can not be interpreted in the sense of SFA. However, a useful extension in the sense of SFA to more than one time delay can be derived. This extended SFA reveals the close connection between the slowness objective of SFA and temporal predictability. Furthermore, we combine CuBICA2 and SFA. The result can be interpreted from two perspectives. From the ICA point of view the combination leads to an algorithm that solves the nonlinear blind source separation problem. From the SFA point of view the combination of ICA and SFA is an extension to SFA in terms of statistical independence. Standard SFA extracts slowly varying signal components that are uncorrelated meaning they are statistically independent up to second-order. The integration of ICA leads to signal components that are more or less statistically independent.
4

Pringle, Jamie S. M. "The oxygen uptake slow component in human locomotion." Thesis, Manchester Metropolitan University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268988.

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5

Powell, Anne Christine. "The effects of type II muscle fibre glycogen depletion on the slow component of oxygen uptake." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ42193.pdf.

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6

Ocel, Jeffrey Vincent Jr. "Adaptation of the Slow Component of VO₂ Following 6 wk of High or Low Intensity Exercise Training." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/40093.

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Eighteen untrained males [age: 23 +/- 0.6 yr (SEM)] were randomized into high intensity (HIT: above lactate threshold, LT), moderate intensity (LIT: below the LT) or no training (NT) groups. Subjects trained on a cycle ergometer 4 days.wk-1 for 6 wk with the power output held constant. Maximal cycle ergometry was performed before and after the training period to determine changes in power output and oxygen consumption (VO2) at the LT and peak exertion. Before training and after 1, 2, 4, and 6 wk, subjects performed high constant-load (HCL) cycling bouts to quantify training adaptations in the SC. Training was designed to keep total work equivalent between the HIT and LIT groups. Increases in power output and VO2 at LT and peak exercise after 6 wk were noted in the HIT and LIT groups in comparison to NT group (p<0.05). No differences were noted between HIT and LIT. Two-way repeated measures ANOVA revealed a significant trial*group interaction for adaptation in the SC (p<0.001). After 1wk of training, a significant reduction in the SC was noted for HIT [mean+/-SEM]: (pre-training (PT): 703 +/- 61 ml.min-1; 1 wk: 396 +/- 60 ml.min-1) (- 44% from PT). Further adaptation for the HIT was also noted at 4 wk: 202 +/- 45 ml.min-1 (-71% from PT). For LIT, a significant reduction was noted at 2 wk (PT: 588+/-76 ml.min-1; 2 wk: 374 +/- 50ml.min-1) (-36% from PT). Further adaptation for LIT group was noted at 6 wk (252 +/- 38 ml.min-1) (- 57% from PT). Adaptation in SC was not noted at any interval for NT. Temporal changes in blood lactate (r = 0.40) and ventilation (r = 0.72) were significantly correlated with the changes for SC over the 6 wk training period (p<0.05). In conclusion, it was demonstrated that training at supra-LT and sub-LT intensities produces similar improvement in VO2 and power output at peak exercise and in the LT, when total work output is controlled. However, training at supra-LT intensity promotes larger and faster adaptations in the SC than training at the sub-LT levels.
Ph. D.
7

Steinlage, Monika [Verfasser], Markus [Akademischer Betreuer] Löbrich, and Alexander [Akademischer Betreuer] Löwer. "Characterization of the slow DNA double-strand break repair component in G1 phase / Monika Steinlage ; Markus Löbrich, Alexander Löwer." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2017. http://d-nb.info/1130786935/34.

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8

Bullock, Laurie A. "Effects of detraining on cardiorespiratory and metabolic responses after six weeks high-intensity cycling." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-02132009-170816/.

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Machado, Fabiana Andrade. "Efeito do modo de exercício sobre a cinética do consumo de oxigênio durante o exercício severo em crianças /." Rio Claro : [s.n.], 2007. http://hdl.handle.net/11449/100398.

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Orientador: Benedito Sérgio Denadai
Banca: Mara Patrícia T. Chacon-Mikahil
Banca: Miguel de Arruda
Banca: Luiz Guilherme Antonacci Guglielmo
Banca: Emerson Franchini
Resumo: A cinética do consumo de oxigênio (V02) descreve o comportamento respiratório durante a transição repouso-exercício. Os parâmetros derivados dos ajustes (componente lento - CL e constante de tempo - t ou Tau) são utilizados para quantificar a magnitude das alterações ocorridas nesse sistema. Os objetivos deste estudo foram: 1) verificar a influência de diferentes modelos de análise [modelo matemático com três termos exponenciais (Exp3) vs. diferença do V02 entre o sexto e o terceiro minuto de exercício (AVO2 6-3 mm)] na caracterização do CL durante o exercício acima do limiar de lactato (LL) em corrida; 2) verificar os efeitos do tipo de exercício [corrida em esteira rolante (ER) vs. exercício em bicicleta ergométrica (BE)] no pico do consumo de oxigênio (VO210) e LL (expresso em ml/kg/mim e % VO2pjc) e; 3) verificar os efeitos do tipo de exercício no tVO2 e no CL da cinética do V02 durante o exercício acima do LL em meninos de 11-12 anos de idade. Participaram do estudo 20 crianças do gênero masculino aparentemente saudáveis e ativos (11,48 l 0,41 anos; 41,38 l 10,45 kg; 147,45 l 6,56 cm), nível maturacional 1 e 2 (pilosidade pubiana) que realizaram dois testes incrementais, um na ER e outro na BÊ para determinação do VO20 e do LL. Para determinação da cinética do VO2 foram realizadas duas transições de 6 minutos em cada ergômetro na intensidade de 75%A [75% A = LL + 0,75 x (VO2pico - LL)]... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The oxygen uptake kinetic (V02) explaian the respiratory behavior during restexercise transition. The parameters from the adjustment (slow component - SC and time constant - t or Tau) are usual to measure the magnitude of the alterations on this structure. The objectives of this study were: 1) to verify the influence of the two different mathematical models [three-exponential model (Exp3) and AVO2 6-3 mm] on the SC of V02 in children during running exercise, performed at above lactate threshold intensity domain (75%A); 2) to verify the effects of exercise mode (running x cycling) on the indexes related to aerobic fitness (VO2peak and blood lactate response to exercise); 3) to verify the effect of the exercise mode (running x cycling) on the tVO2 and the SC of the VO2 in children aged 11 to 12 years during above lactate threshold intensity exercise (75%). Twenty apparently healthy active boys (age = 11,48 l 0,41 years; body mass = 41,38 l 10,45 kg; hemght = 147,45 l 6,56 cm), sexual maturation levels 1 and 2 (pubic hair) took part of this study. These children performed in different days on a motorized treadmill (TM) and on a cycle ergometer (CE) the following tests: 1) an incremental test in order to determine the peak oxygen uptake (VO2peak) and the LT and; 2) a series of square-wave transitions of 6-min \- 02peak - iJ1) 111 OTT 'Lo Õe'Lerffilne Yne V02 kinetics (tVO2 and SC). The SC values determined by model Exp3 (129,69 l 75,71 mi/min and 8,4 l 2,92 %) were higher than values determined by model VO2 6-3 mm (68,69 l 102,54 mi/min and 3,6 l 7,34%)... (Complete abstract click electronic access below)
Doutor
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LU, Zhibo. "Blockade of Slow Component of the Delayed Rectifier K^+ Current (I_) Prolonged Action Potential Duration (APD) without Increasing Dispersion between Ventricles(RIEM Conference II, 2002)." Research Institute of Environmental Medicine, Nagoya University, 2002. http://hdl.handle.net/2237/2807.

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Книги з теми "Slow component of VO2":

1

Branch, Alberta Curriculum. Occupational component, 36-level courses: Teacher resource manual. Edmonton: Alberta Education, Curriculum Branch, 1992.

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Branch, Alberta Curriculum. Occupational component, 36-level courses: Programs of studies/curriculum guide. Edmonton: Alberta Education, Curriculum Branch, 1992.

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Program, Integrated Occupational. Occupational component, 26-level courses: Program of studies/curriculum guide, grade 11. Edmonton, Alta: Alberta Education, 1991.

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Program, Integrated Occupational. Occupational component, 16-level courses: Program of studies/curriculum guide, grade 10. [Edmonton, Alta.]: Alberta Education, 1990.

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Program, Integrated Occupational. Integrated Occupational Program, Occupational component 16-26-36: Program of studies, grades 10, 11 and 12. [Edmonton, Alta: Alberta Education], 1991.

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Pringle, Jamie S. M. The oxygen uptake slow component in human locomotion. 2002.

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7

Occupational component, 26-level courses: Teacher resource manual. Edmonton, Alta: Curriculum, Alberta Education, 1991.

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8

Baloh, Robert W. Bárány’s Life in Uppsala and His Work with Lorente de Nó. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780190600129.003.0012.

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Lorente de Nó came to Uppsala, Sweden, in 1924 to work with Robert Bárány, with the goal of studying the central nervous system pathways of the vestibular nystagmus response. Bárány’s 1907 book described a patient with a lesion involving the reticular formation of the pons close to the abducens nucleus who could generate only the slow phase of nystagmus. With stimulation, the patient’s eyes slowly deviated to one side and became pinned. The patient also had a loss of voluntary eye movements. Bárány concluded that there must be separate centers in the brainstem for the production of the slow and fast phases of nystagmus. He speculated that the center for generating fast phases was in the reticular substance next to the abducens nucleus and that this component was under the influence of cortical control. Nó would go on to perform studies of these central pathways for generating nystagmus in rabbit.
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Barker, Alan R., and Neil Armstrong. Pulmonary oxygen uptake kinetics. Edited by Neil Armstrong and Willem van Mechelen. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780198757672.003.0013.

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The pulmonary oxygen uptake (pV̇O2) kinetic response to exercise provides valuable non-invasive insight into the control of oxidative phosphorylation and determinants of exercise tolerance in children and adolescents. Few methodologically robust studies have investigated pV̇O2 kinetics in children and adolescents, but age- and sex-related differences have been identified. There is a clear age-related slowing of phase II pV̇O2 kinetics during heavy and very heavy exercise, with a trend showing during moderate intensity exercise. During heavy and very heavy exercise the oxygen cost is higher for phase II and the pV̇O2 component is truncated in children. Sex-related differences occur during heavy, but not moderate, intensity exercise, with boys having faster phase II pV̇O2 kinetics and a smaller pV̇O2 slow component compared to girls. The mechanisms underlying these differences are likely related to changes in phosphate feedback controllers of oxidative phosphorylation, muscle oxygen delivery, and/or muscle fibre recruitment strategies.
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Bjork, R. A. Prologue. Edited by John Dunlosky and Sarah (Uma) K. Tauber. Oxford University Press, 2016. http://dx.doi.org/10.1093/oxfordhb/9780199336746.013.32.

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In this prologue, I comment on key events in the history of research on metamemory and on my own reactions to those events—beginning with the now-famous research on feeling-of-knowing judgments carried out by Joe Hart 50 years ago when Joe and I were both graduate students at Stanford University. After speculating on why mainstream memory researchers, me in particular, were slow to realize the importance of research on metacognitive processes, even after John Flavell and Henry Wellman had provided an elegant definition of the field during the 1970s, I discuss the events and dynamics that ultimately made it clear that understanding metacognitive processes is a critical component of understanding human learning and memory processes more broadly.

Частини книг з теми "Slow component of VO2":

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Lynch, Gordon S., David G. Harrison, Hanjoong Jo, Charles Searles, Philippe Connes, Christopher E. Kline, C. Castagna, et al. "Slow Component of VO2 on-kinetics." In Encyclopedia of Exercise Medicine in Health and Disease, 794–95. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-540-29807-6_3045.

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Blaschke, Tobias, and Laurenz Wiskott. "Independent Slow Feature Analysis and Nonlinear Blind Source Separation." In Independent Component Analysis and Blind Signal Separation, 742–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-30110-3_94.

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Huber, R., C. Kübler, H. Ehrke, R. Lopez, A. Halabica, R. F. Haglund, and A. Leitenstorfer. "THz Slow Motion of an Ultrafast Insulator-Metal Transition in VO2: Coherent Structural Dynamics and Electronic Correlations." In Springer Series in Chemical Physics, 179–81. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-95946-5_58.

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Ooms, J. J. J., and W. J. Vredenberg. "Analysis of the Slow Component of the Flash-Induced P515 Response in Chloroplasts." In Techniques and New Developments in Photosynthesis Research, 267–70. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4684-8571-4_34.

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Li, Jianqing, Hongli Li, Jing Li, Jianmin Chen, Kai Liu, Zheng Chen, and Li Liu. "Distributed Heterogeneous Parallel Computing Framework Based on Component Flow." In Proceeding of 2021 International Conference on Wireless Communications, Networking and Applications, 437–45. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2456-9_45.

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AbstractSingle processor has limited computing performance, slow running speed and low efficiency, which is far from being able to complete complex computing tasks, while distributed computing can solve such huge computational problems well. Therefore, this paper carried out a series of research on the heterogeneous computing cluster based on CPU+GPU, including component flow model, multi-core multi processor efficient task scheduling strategy and real-time heterogeneous computing framework, and realized a distributed heterogeneous parallel computing framework based on component flow. The results show that the CPU+GPU heterogeneous parallel computing framework based on component flow can make full use of the computing resources, realize task parallel and load balance automatically through multiple instances of components, and has the characteristics of good portability and reusability.
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Wasserman, Karlman, William W. Stringer, and Richard Casaburi. "Is the Slow Component of Exercise $$ (\dot V{o_2}) $$ a Respiratory Adaptation to Anaerobiosis?" In Advances in Experimental Medicine and Biology, 187–94. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4615-1933-1_36.

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Bell, C., D. H. Paterson, M. A. Babcock, and D. A. Cunningham. "Characteristics of the V̇O2 Slow Component During Heavy Exercise in Humans Aged 30 to 80 Years." In Advances in Experimental Medicine and Biology, 219–22. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4757-9077-1_35.

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Baalham, Paul, and Ole Steuernagel. "Two-Component Traffic Modelled by Cellular Automata: Imposing Passing Restrictions on Slow Vehicles Increases the Flow." In Stochastic Algorithms: Foundations and Applications, 138–45. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-39816-5_13.

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Casaccia, Patrizia, Anna Ladogana, Carlo Masullo, Giorgio Macchi, and Maurizio Pocchiari. "Possible Implications of the Cellular Component of the Immune System in the Pathogenesis of Unconventional Slow Virus Infections." In Trends in Neuroimmunology, 135–49. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4613-0607-8_17.

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Elmokashfi, Ahmed, Simon Funke, Timo Klock, Miroslav Kuchta, Valeriya Naumova, and Julie Uv. "Chapter 6 Digital tracing, validation, and reporting." In Simula SpringerBriefs on Computing, 99–120. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-05466-2_6.

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AbstractManual contact tracing has been a key component in controlling the outbreak of the COVID-19 pandemic. The identification and isolation of close contacts of confirmed cases have successfully interrupted transmission chains and reduced the disease spread. Even though manual contact tracing has been widely used, its practice has shown that it is slow and cannot be scaled up once the epidemic grows beyond the early phase. In this case, digital contact tracing can play a significant role in controlling the pandemic. In this chapter, based on our experience and lessons learned from the Smittestopp project, we discuss the main prerequisites for the efficient implementation and validation of digital contact tracing in a population. Specifically, we discuss how to translate a close contact defined for manual tracing to proximity events discovered by a phone, that is, how to define a meaningful risk score and validate the digital contact tracing. We discuss challenges related to each step and provide solutions to some of them, even though questions still remain.

Тези доповідей конференцій з теми "Slow component of VO2":

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Sperl, Matthias. "Logarithmic decay in a two-component model." In SLOW DYNAMICS IN COMPLEX SYSTEMS: 3rd International Symposium on Slow Dynamics in Complex Systems. AIP, 2004. http://dx.doi.org/10.1063/1.1764224.

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Matsunaga, Yasuhiro. "Protein folding dynamics: ergodic behavior in principal component space." In SLOW DYNAMICS IN COMPLEX SYSTEMS: 3rd International Symposium on Slow Dynamics in Complex Systems. AIP, 2004. http://dx.doi.org/10.1063/1.1764166.

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Ventouras, Errikos M., Periklis Y. Ktonas, Hara Tsekou, Thomas Paparrigopoulos, Ioannis Kalatzis, and Constantin R. Soldatos. "Slow and fast EEG sleep spindle component extraction using Independent Component Analysis." In 2008 8th IEEE International Conference on Bioinformatics and BioEngineering (BIBE). IEEE, 2008. http://dx.doi.org/10.1109/bibe.2008.4696821.

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Seto, Hideki, Shigehiro Komura, Dietmar Schwahn, and Kell Mortensen. "Mean-field behavior at phase separation in 3-component microemulsion system." In Slow dynamics in condensed matter. AIP, 1992. http://dx.doi.org/10.1063/1.42375.

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Wada, Hirofumi. "Dynamics of phase separation in confined two-component fluid membranes." In SLOW DYNAMICS IN COMPLEX SYSTEMS: 3rd International Symposium on Slow Dynamics in Complex Systems. AIP, 2004. http://dx.doi.org/10.1063/1.1764091.

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Weeks, Abbie, Jaime Tierney, and Brett Byram. "Block-wise Independent Component Analysis for Slow Flow Non-Contrast Ultrasound Imaging." In 2019 IEEE International Ultrasonics Symposium (IUS). IEEE, 2019. http://dx.doi.org/10.1109/ultsym.2019.8926293.

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Yang, Fan, Liyuan Zhang, and Ren-Yuan Zhu. "Slow scintillation component and radiation induced readout noise in pure CsI crystals." In 2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD). IEEE, 2016. http://dx.doi.org/10.1109/nssmic.2016.8069692.

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Nizovtseva, I. G. "Multi-grain evolution under slow, intermediate and fast regimes of solidification in multi-component alloying system." In PHYSICS, TECHNOLOGIES AND INNOVATION (PTI-2019): Proceedings of the VI International Young Researchers’ Conference. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5134385.

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Chaudhary, Miriam E., and Peter S. Walker. "Investigation of an Early Intervention Tibial Component for Medial Osteoarthritis." In ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80258.

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Total knee arthroplasty (TKA) is usually the treatment of choice for severe osteoarthritis (OA) of the knee. Numerous clinical studies of TKA have shown high rates of long-term joint survival with good function [1]. Nevertheless, alternatives to this established procedure are being increasingly considered for several reasons. Postoperatively, patients frequently experience a slow rehabilitation and do not fully recover normal function [2]. On the other hand, there is a growing pressure to reduce operating time while increasing the use of less invasive surgical techniques.
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Kamioka, Naotaka, Tomohiro Tetsumoto, and Takasumi Tanabe. "FDTD with an off-diagonal permittivity tensor component to study the magneto-optical effect in a slow light waveguide." In Frontiers in Optics. Washington, D.C.: OSA, 2017. http://dx.doi.org/10.1364/fio.2017.jw4a.54.

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Звіти організацій з теми "Slow component of VO2":

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Riley, Robert, and James Amonette. Summary of PNNL Component of Project No.86729 Mechanisms of CCl4 Retention and Slow Release in Model Porous Solids and Sediments. Office of Scientific and Technical Information (OSTI), June 2004. http://dx.doi.org/10.2172/839156.

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Lichter, Amnon, Joseph L. Smilanick, Dennis A. Margosan, and Susan Lurie. Ethanol for postharvest decay control of table grapes: application and mode of action. United States Department of Agriculture, July 2005. http://dx.doi.org/10.32747/2005.7587217.bard.

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Original objectives: Dipping of table grapes in ethanol was determined to be an effective measure to control postharvest gray mold infection caused by Botrytis cinerea. Our objectives were to study the effects of ethanol on B.cinerea and table grapes and to conduct research that will facilitate the implementation of this treatment. Background: Botrytis cinerea is known as the major pathogen of table grapes in cold storage. To date, the only commercial technology to control it relied on sulfur dioxide (SO₂) implemented by either fumigation of storage facilities or from slow release generator pads which are positioned directly over the fruits. This treatment is very effective but it has several drawbacks such as aftertaste, bleaching and hypersensitivity to humans which took it out of the GRAS list of compounds and warranted further seek for alternatives. Prior to this research ethanol was shown to control several pathogens in different commodities including table grapes and B. cinerea. Hence it seemed to be a simple and promising technology which could offer a true alternative for storage of table grapes. Further research was however required to answer some practical and theoretical questions which remained unanswered. Major conclusions, solutions, achievements: In this research project we have shown convincingly that 30% ethanol is sufficient to prevent germination of B. cinerea and kill the spores. In a comparative study it was shown that Alternaria alternata is also rather sensitive but Rhizopus stolonifer and Aspergillus niger are less sensitive to ethanol. Consequently, ethanol protected the grapes from decay but did not have a significant effect on occurrence of mycotoxigenic Aspergillus species which are present on the surface of the berry. B. cinerea responded to ethanol or heat treatments by inducing sporulation and transient expression of the heat shock protein HSP104. Similar responses were not detected in grape berries. It was also shown that application of ethanol to berries did not induce subsequent resistance and actually the berries were slightly more susceptible to infection. The heat dose required to kill the spores was determined and it was proven that a combination of heat and ethanol allowed reduction of both the ethanol and heat dose. Ethanol and heat did not reduce the amount or appearance of the wax layers which are an essential component of the external protection of the berry. The ethanol and acetaldehyde content increased after treatment and during storage but the content was much lower than the natural ethanol content in other fruits. The efficacy of ethanol applied before harvest was similar to that of the biological control agent, Metschnikowia fructicola, Finally, the performance of ethanol could be improved synergistically by packaging the bunches in modified atmosphere films which prevent the accumulation of free water. Implications, both scientific and agricultural: It was shown that the major mode of action of ethanol is mediated by its lethal effect on fungal inoculum. Because ethanol acts mainly on the cell membranes, it was possible to enhance its effect by lowering the concentration and elevating the temperature of the treatment. Another important development was the continuous protection of the treated bunches by modified atmosphere that can solve the problem of secondary or internal infection. From the practical standpoint, a variety of means were offered to enhance the effect of the treatment and to offer a viable alternative to SO2 which could be instantly adopted by the industry with a special benefit to growers of organic grapes.

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