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Relevant bibliographies by topics / Vertical Jump Performance

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Academic literature on the topic 'Vertical Jump Performance'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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Journal articles on the topic "Vertical Jump Performance"

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Koziris, Perry. "Vertical Jump Performance." Strength and Conditioning Journal 34, no. 5 (2012): 99–100. http://dx.doi.org/10.1519/ssc.0b013e3182593fc2.

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Kirby, Tyler J., Jeffrey M. McBride, Tracie L. Haines, and Andrea M. Dayne. "Relative Net Vertical Impulse Determines Jumping Performance." Journal of Applied Biomechanics 27, no. 3 (2011): 207–14. http://dx.doi.org/10.1123/jab.27.3.207.

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The purpose of this investigation was to determine the relationship between relative net vertical impulse and jump height in a countermovement jump and static jump performed to varying squat depths. Ten college-aged males with 2 years of jumping experience participated in this investigation (age: 23.3 ± 1.5 years; height: 176.7 ± 4.5 cm; body mass: 84.4 ± 10.1 kg). Subjects performed a series of static jumps and countermovement jumps in a randomized fashion to a depth of 0.15, 0.30, 0.45, 0.60, and 0.75 m and a self-selected depth (static jump depth = 0.38 ± 0.08 m, countermovement jump depth = 0.49 ± 0.06 m). During the concentric phase of each jump, peak force, peak velocity, peak power, jump height, and net vertical impulse were recorded and analyzed. Net vertical impulse was divided by body mass to produce relative net vertical impulse. Increasing squat depth corresponded to a decrease in peak force and an increase in jump height and relative net vertical impulse for both static jump and countermovement jump. Across all depths, relative net vertical impulse was statistically significantly correlated to jump height in the static jump (r= .9337,p< .0001, power = 1.000) and countermovement jump (r= .925,p< .0001, power = 1.000). Across all depths, peak force was negatively correlated to jump height in the static jump (r= –0.3947,p= .0018, power = 0.8831) and countermovement jump (r= –0.4080,p= .0012, power = 0.9050). These results indicate that relative net vertical impulse can be used to assess vertical jump performance, regardless of initial squat depth, and that peak force may not be the best measure to assess vertical jump performance.

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Gerber, C., P. Sirieiro, I. Nasser, C. Taber, and H. Miranda. "Postactivation potentiation improves jumps performance in children ages 6 to 8 years old." Archivos de Medicina del Deporte 38, no. 3 (2021): 192–96. http://dx.doi.org/10.18176/archmeddeporte.00043.

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Introduction: The aim of the present study was to investigate the effects of postactivation potentiation (PAP) in vertical and horizontal jump performance in pre-pubertal children. Material and method: One hundred and nineteen children (65 girls and 54 boys; 6.8 ± 0.7 years old; 124.5 ± 6.4 cm; 25.2 ± 5.1 kg) participated in this study. This was a transversal cross-sectional study which incorporated a within-subjects repeatedmeasures design, where participants completed all protocols. The experimental procedure required four total testing, separated by one week, using a counterbalanced. This study investigated jumping performance associated with weighted jumps, lowload vertical jumps, and horizontal jumps. During two sessions the participants performed vertical jumps with and without PAP, the other two sessions the same procedures were performed for horizontal jumps. The PAP protocol consisted of one set of five weighted countermovement jumps with low-load (10% of body mass) and a rest interval of four minutes prior to the jump tests. Paired t-tests were used between conditions (PAP and control) in the vertical jump and horizontal jump test. In addition, Cohen’s d effect size and 95% confidence interval was used. Results: Significant jump height was observed in the vertical jump in the PAP condition compared to the control condition (p = 0.007). Similar results were observed for the horizontal jump tests, with significant longer distance observed in the PAP condition (p = 0.036). Conclusions: Pre-pubertal children can benefit from the effects of PAP in vertical and horizontal jumping performance when preceded by low-load ballistic movements. A protocol implementing low-loads, determined by a relative percentage of body mass is effective to promote PAP for young children.

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Hurr, Chansol. "Acute Local Cooling to the Lower Body during Recovery Does Not Improve Repeated Vertical Jump Performance." International Journal of Environmental Research and Public Health 18, no. 9 (2021): 5026. http://dx.doi.org/10.3390/ijerph18095026.

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BACKGROUND: Local cooling, or cryotherapy, has received attention due to its effects on athlete recovery before or after strenuous exercise. This study seeks to verify the effectiveness of 3 min applications of acute local cooling to the lower extremities between sets of a repeated vertical jump exercise. METHODS: Using a randomized crossover design, twelve subjects performed a total of 3 sets of 30 consecutive maximal vertical jumps and were allowed a recovery period of 5 min after each set. In the recovery period, subjects rested with or without a cooling suit worn on their lower legs. Changes in heart rate, blood lactate, and rate of perceived exertion were assessed. RESULTS: Vertical jump performance steadily decreased during 30 consecutive vertical jumps in all 3 sets; however, no differences in jump performance were observed among the groups. Heart rate, blood lactate, and rate of perceived exertion tended to be lower in the cooling recovery group relative to the control group. CONCLUSION: The current study provides evidence that acute local cooling recovery after a vertical jump exercise may not add any performance benefits but may provide a psychological benefit. The effectiveness of acute local cooling in other functional performances should be addressed in further research.

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Bogdanis, Gregory C., Athanasios Tsoukos, and Panagiotis Veligekas. "Improvement of Long-Jump Performance During Competition Using a Plyometric Exercise." International Journal of Sports Physiology and Performance 12, no. 2 (2017): 235–40. http://dx.doi.org/10.1123/ijspp.2016-0116.

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Purpose:To examine the acute effects of a conditioning plyometric exercise on long-jump performance during a simulated long-jump competition.Methods:Eight national-level track and field decathletes performed 6 long-jump attempts with a full approach run separated by 10-min recoveries. In the experimental condition subjects performed 3 rebound vertical jumps with maximal effort 3 min before the last 5 attempts, while the 1st attempt served as baseline. In the control condition the participants performed 6 long jumps without executing the conditioning exercise.Results:Compared with baseline, long-jump performance progressively increased only in the experimental condition, from 3.0%, or 17.5 cm, in the 3rd attempt (P = .046, d = 0.56), to 4.8%, or 28.2 cm, in the 6th attempt (P = .0001, d = 0.84). The improvement in long-jump performance was due to a gradual increase in vertical takeoff velocity from the 3rd (by 8.7%, P = .0001, d = 1.82) to the 6th jump (by 17.7%, P = .0001, d = 4.38). Horizontal-approach velocity, takeoff duration, and horizontal velocity at takeoff were similar at all long-jump attempts in both conditions (P = .80, P = .36, and P = .15, respectively).Conclusions:Long-jump performance progressively improved during a simulated competition when a plyometric conditioning exercise was executed 3 min before each attempt. This improvement was due to a progressive increase in vertical velocity of takeoff, while there was no effect on the horizontal velocity.

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Aragón-Vargas, Luis F., and M. Melissa Gross. "Kinesiological Factors in Vertical Jump Performance: Differences among Individuals." Journal of Applied Biomechanics 13, no. 1 (1997): 24–44. http://dx.doi.org/10.1123/jab.13.1.24.

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The purpose of this study was to investigate the kinesiological factors that distinguish good jumpers from poor ones, in an attempt to understand the critical factors in vertical jump performance(VJP).Fifty-two normal, physically active male college students each performed five maximal vertical jumps with arms akimbo. Ground reaction forces and video data were collected during the jumps. Subjects' strength was tested isometrically. Thirty-five potential predictor variables were calculated for statistical modeling by multiple-regression analysis. At the whole-body level of analysis, the best models (which included peak and average mechanical power) accounted for 88% ofVJPvariation (p< .0005). At the segmental level, the best models accounted for 60% of variation inVJP(p< .0005). Unexpectedly, coordination variables were not related toVJP. These data suggested thatVJPwas most strongly associated with the mechanical power developed during jump execution.

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Loturco, Irineu, Lucas Pereira, Ronaldo Kobal, et al. "Functional Screening Tests: Interrelationships and Ability to Predict Vertical Jump Performance." International Journal of Sports Medicine 39, no. 03 (2017): 189–97. http://dx.doi.org/10.1055/s-0043-122738.

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AbstractThere are several methods used in sports science to identify asymmetries in athletes, given their purported relevance to injury prevention and performance optimization. We aimed to verify whether asymmetries provided by isokinetic assessments, jump tests, and tensiomyography (TMG) are associated with each other, and whether their respective functional indices are related to jumping ability. TMG parameters, unilateral and bilateral squat-jump (SJ) and countermovement-jump (CMJ) performances, and peak torque in knee-extension and flexion with angular velocities of 60o/s and 300o/s for twenty-four soccer players were retained for analyses. Asymmetry was detected by examining the percentage difference between dominant and non-dominant legs. The median-split technique was used to identify the best and worst performers in SJ and CMJ tests. Results revealed that the asymmetries detected in the three different methods were not interrelated. Curiously, better performances in SJ and CMJ tests were associated with higher asymmetry levels. Furthermore, only the knee-extension peak torque at both angular velocities was correlated moderately to largely (r=0.48-0.66) with jump performance. Despite their recognized ability to predict the risk of injury, the absence of interrelationships between TMG, isokinetic tests, and unilateral jumps precludes their single use as a unique functional screening diagnostic. Finally, and very importantly, lower-limb asymmetry is not necessarily related to impaired vertical jump performance in soccer players.

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Atli, Ahmet, and Ali Furkan Yarar. "Kinematic Analysis of Vertical Jump Performances Before and After Fatigue in Basketball Players." Pakistan Journal of Medical and Health Sciences 15, no. 7 (2021): 2226–28. http://dx.doi.org/10.53350/pjmhs211572226.

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Background and Study Aim: This single group pre- and post-test study aimed to examine kinematic changes in vertical jump performances before and after fatigue in basketball players. Material and Method: Ten male university student (age 23.28±1.31 years, height 181.17±6.87 cm, body weight 74.53±9.27 kg) basketball players voluntarily participated in the study. Vertical jump test was performed twice, once before fatigue and again after fatigue, and jump measurements were recorded with 2 cameras capable of shooting 240 frames per second. The vertical jumps were measured using a Smart Speed device. The recorded measurements were analyzed using a biomechanical analysis program, and the results were analyzed statistically. Each participant performed 5 resting jumps on the jump mat after warm-up, and the highest height reached was determined as the jump height. Next, the protocol for inducing fatigue was initiated without a period of rest, and the participants were asked to sprint 6x10 m, following which vertical jumps were performed 5 times without any break. The maximum value of each parameter obtained from among the 5 vertical jumps was used for analysis. The protocol for inducing fatigue was followed until the post-fatigue vertical jump parameter values were below 70% of the maximum values recorded before fatigue. Pre- and post-fatigue jump parameter values were statistically analyzed using the paired samples t-test. Results and Conclusion: Statistically significant differences were observed in knee flexion angle measurements before and after fatigue as well as in jump height measurements before and after fatigue (p<0.05). Therefore, it is believed that fatigue may be associated with a risk of knee joint injury in basketball players. Keywords: Kinematic Analysis, Vertical Jump, Performance, Fatigue, Basketball Players

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Zhang, Yan, Guoqing Ruan, and Yaodong Gu. "Metatarsal strapping improve vertical jump performance." Footwear Science 7, sup1 (2015): S48—S49. http://dx.doi.org/10.1080/19424280.2015.1038601.

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Smith, Bradley, Tina Claiborne, and Victor Liberi. "Ankle Bracing Decreases Vertical Jump Height and Alters Lower Extremity Kinematics." International Journal of Athletic Therapy and Training 21, no. 2 (2016): 39–46. http://dx.doi.org/10.1123/ijatt.2014-0143.

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The purpose of this study was to determine the effects of ankle bracing on vertical jump performance and lower extremity kinematics and electromyography (EMG) activity. Twenty healthy college athletes participated in two sessions, separated by a minimum of 24 hr. They performed five jumps with no brace on the first day, and five jumps with both ankles braced on the second day. An average of the three highest jumps each day was used for analysis. Braced vertical jump performance significantly decreased (p = .002) as compared with the unbraced condition. In addition, hip flexion (p = .043) and ankle plantar flexion (p = .001) angles were significantly smaller during the braced vertical jump. There was also a significant reduction in soleus muscle EMG (p = .002) during the braced condition.

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Dissertations / Theses on the topic "Vertical Jump Performance"

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Evans, Tom. "The effects of static stretching on vertical jump performance." Huntington, WV : [Marshall University Libraries], 2006. http://www.marshall.edu/etd/descript.asp?ref=635.

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Antunes, Mário. "Efeitos agudos da aplicação de Kinesio Tape na performance do salto vertical." Bachelor's thesis, [s.n.], 2014. http://hdl.handle.net/10284/4322.

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Projeto de Graduação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Licenciado em Fisioterapia<br>Introdução: A aplicação de Kinesio Tape tem sido utilizada para melhorar o desempenho desportivo. O objetivo deste estudo foi analisar os efeitos agudos da aplicação de Kinesio Tape na performance do salto vertical. Metodologia: A amostra foi constituída por 12 participantes (7 mulheres e 5 homens), com idades compreendidas entre os 18 e os 35 anos. Todos os participantes foram avaliados em duas sessões onde foi aplicado o procedimento experimental ou de controlo, de forma randomizada. Para avaliar o desempenho do salto vertical recorreu-se à utilização do Ergojump®. Resultados: Verificou-se uma diminuição significativa da performance após o procedimento de controlo que não se verificou após a aplicação da ligadura. Conclusão: A aplicação da ligadura não melhorou a performance do salto vertical, mas parece indiciar efeitos protetores de diminuição da performance de salto. Introduction: The application of Kinesio Tape has been used to improve athletic performance. The aim of this study was to analyze the acute effects of Kinesio Tape on the vertical jump performance. Methodology: The sample consisted in 12 participants (7 women and 5 men), with ages between 18 and 35 years. All the participants were assessed in two sessions for the application of the control and experimental procedures in a random order. The Ergojump®was used for the evaluation of the jump performance. Results: A significant decrease of the performance was found after the control procedure but not after the Kinesio Tape application. Conclusion: The Kinesio Tape did not improve the vertical jump performance, but seems to indicate protective effects in the decrease of the jump performance.

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Diaz, Nicholas. "Acute effects of the power snatch on vertical jump performance." Scholarly Commons, 2016. https://scholarlycommons.pacific.edu/uop_etds/304.

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The purpose of this study was to examine the acute effects of the power snatch exercise at specific intensities on vertical jump performance. 10 weightlifters attended two sessions: a power snatch (PS) and control (CON) condition. Each session was separated with at least 48 hours in between. This study used a 1-group experimental design. During the PS condition, participants performed the power snatch exercise at increasing intensities (40% 1 repetition max [RM], 60% 1RM, and 80% 1RM) after a dynamic warm up. Vertical jump performance was measured prior to the warm up, and after each power snatch exercise in the PS condition. During the CON condition, vertical jump performance was measured at the same times, with the participants substituting the power snatch exercise for a seated position. The results showed no significance ( p > 0.05) in vertical jump performance during each condition, with a trend being seen during the gradual increase in intensities. These results suggest further research is needed utilizing a larger sample size to show significance.

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de, Paula Santana Hugo A. "Relationship of Force Variables to Vertical Jumps Performance." Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etd/2618.

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The isometric mid-thigh pull (IMTP) has been cited often in the scientific literature; however, there is still a lack of agreement as to the ideal body position used during this test, and how body position impacts the relationship between IMTP performance and dynamic performance. Thus, one aim of this dissertation was to compare two different IMTP positions and correlate the kinetic outputs from each position to vertical jump (VJ) performance. Another purpose of this dissertation was analyze which method of data normalization for IMTP force variables best correlates to squat jump (SJ) and countermovement jump (CMJ) performance. In the first study, subjects presented higher force outputs for an upright position (hip angles 145°, knee 125°) when compared to a bent position (hip angles 125°, knee 125°). However, there were no statistical differences among correlations from the two positions when correlating to VJ performance. Thus, we suggest that the upright position should be the one used for research and monitoring due to higher force values presented. The second part of this study was to compare correlations from non-normalized and normalized data from the IMTP to SJ and CMJ. Besides non-normalized data, five common methods of normalization were used – subtracting the body mass force, dividing the forces per body mass, allometric scale, scaling by height (Ford’s scale) and scaling by Sinclair coefficient value. In general, higher value correlations were presented with the non-normalized methods for both jumps – SJ and CMJ. Therefore, when using IMTP data to correlate with VJ performance, there is no need to normalize the data.

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Scott, Stefan Lewis. "Acute effect of heavy pre-loading on horizontal and vertical jump performance." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ58548.pdf.

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Sands, William A., Jeni R. McNeal, and Michael H. Stone. "Vibration, Split Stretching, and Static Vertical Jump Performance in Young Male Gymnasts." Digital Commons @ East Tennessee State University, 2009. https://dc.etsu.edu/etsu-works/4516.

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Bazett-Jones, David M. "Comparing the effects of different whole-body vibration intensities on vertical jump performance." Virtual Press, 2006. http://liblink.bsu.edu/uhtbin/catkey/1339140.

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Whole-body vibration (WBV) has been shown to enhance vertical jump performance. The purpose of this study was to determine which WBV intensity has the greatest effect on counter movement jump (CMJ) height and the duration of that affect. Forty-four participants, of varying training statuses, were tested. They participated in > 4 familiarization sessions, to eliminate learning effects. Participants performed a pre-test, followed randomly by one of 5 WBV intensities. Participants performed 3 maximal CMJs immediately, 5, and 10 min following treatment. The best performance was used and calculated as a percentage of the pre-treatment values. A multivariate model (treatment X time X gender) was used to analyze the data. The three-way interaction approached significance (p=0.053) and significance was found for all two way interactions. Females performed the best immediately following the 2.71g treatment (116.9 + 38.4%). Male participants did not increase their performance; however, they may require longer durations of vibration exposure to elicit effects. The differences between males and females may also indicate that the effects of WBV are dependent on strength, stiffness, and/or training levels. Future research should continue to systematically investigate the effects of vibration and participant characteristics on WBV and performance.Keywords: power, frequency, amplitude, training, potentiation, stiffness.<br>School of Physical Education, Sport, and Exercise Science

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Stevenson, Deja Lee. "Whole-Body Vibration and Its Effects on Electromechanical Delay and Vertical Jump Performance." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd867.pdf.

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Jenkins, Karen M. "The effect of wearing strength shoes during plyometric training on vertical jump performance." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06232009-063100/.

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Costa, Ângela. "Efeitos agudos da vibração corporal na performance do salto vertical." Bachelor's thesis, [s.n.], 2012. http://hdl.handle.net/10284/3435.

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Trabalho apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Licenciada em Fisioterapia<br>Introdução: O exercício vibratório é uma nova modalidade que surgiu na prática desportiva e reabilitação que tem sido utilizada frequentemente para ganhos de força e potência. O objectivo deste estudo é analisar a influência dos efeitos agudos da plataforma vibratória no desempenho do salto vertical. Metodologia: A amostra foi composta por cinquenta e quatro indivíduos (26 mulheres e 28 homens), com uma média de idades de 23,87±3,948 anos. Foi dividida aleatoriamente em dois grupos: o grupo experimental (exposto a vibração de 40Hz) e o grupo de controlo (sem vibração). Utilizando um Ergojump™ foi avaliada a altura de salto antes e depois da exposição à vibração e à exposição de controlo. Resultados: Não houve diferenças significativas entre nos dois momentos de avaliação da altura de salto. Os resultados são significativos no sexo masculino para a altura do salto vertical no grupo de controlo e no sexo feminino os valores são significativos no grupo experimental. Conclusão: A exposição a uma única sessão de vibração parece não influenciar na performance do salto vertical. Introduction: The vibration exercise is a new modality that has emerged in sports and rehabilitation that has been used frequently to gain strength and power. The aim of this study is to analyze the influence of acute effects of vibration platform in vertical jump performance. Methodology: The sample consisted of fifty-four subjects (26 women and 28 men) with a mean age of 23.87 ± 3.948 years. Was randomly divided into two groups: the experimental group (exposed to vibration of 40Hz) and control group (without vibration). Using a Ergojump ™ was assessed jump height before and after exposure to vibration, the exposure control. Results: There were no significant differences between the two time points for the jump height. The results are significant in males for the vertical jump height in the control group and female values are significant in the experimental group. Conclusion: Exposure to a single bout of vibration does not influence the performance of the vertical jump.

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Books on the topic "Vertical Jump Performance"

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The effects of a different arm swing on vertical jump and toe-touch jump performance. 1992.

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The effects of a different arm swing on vertical jump and toe- touch jump performance. 1990.

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The effects of a different arm swing on vertical jump and toe- touch jump performance. 1990.

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The effects of the Strength Shoe on vertical jump performance in male collegiate basketball players. 1989.

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The effects of the Strength Shoe on vertical jump performance in male collegiate basketball players. 1989.

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The effects of the Strength Shoe on vertical jump performance in male collegiate basketball players. 1992.

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The effect of toe and plantar flexor strength training on vertical jump performance of folk dancers. 1991.

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Brassard, Marc F. The effect of the airstirrup and a conventional method of strapping the ankle on agility and vertical jump performance. 1990.

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The effect of the airstirrup and a conventional method of strapping the ankle on agility and vertical jump performance. 1988.

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Book chapters on the topic "Vertical Jump Performance"

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Costa, D. C., M. N. Souza, and A. V. Pino. "Effects of Superimposed Electrical Stimulation Training on Vertical Jump Performance: A Comparison Study between Men and Women." In IFMBE Proceedings. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-00846-2_33.

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McMahon, John J., Jason P. Lake, and Timothy J. Suchomel. "Vertical jump testing." In Performance Assessment in Strength and Conditioning. Routledge, 2018. http://dx.doi.org/10.4324/9781315222813-8.

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"Biomechanics of vertical jump performance in unilateral trans-tibial amputees." In Routledge Handbook of Ergonomics in Sport and Exercise. Routledge, 2013. http://dx.doi.org/10.4324/9780203123355-58.

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Baena Marín, Mateo, Alejandro Gómez Rodas, Diego A. Bonilla, Luis Enrique Isaza Velásquez, and Anthony Baculima López. "Efectos agudos de la aplicación del Dynamic Tape® sobre el rendimiento de salto vertical: un estudio de caso." In Competitive Risaralda, generating research alliances for development. Universidad Tecnológica de Pereira, 2021. http://dx.doi.org/10.22517/9789587224955.3.2.

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Different types of neuromuscular tapes have led to no consensus about its benefits on muscle performance. Unlike kinesiology and rigid tapes, Dynamic Tape® has different composition and properties with unknown effects on performance. The aim of this exploratory-type case study was to report the acute effects of dynamic tape® application on vertical jump performance. Material and methods: Using a test-retest methodology, a case study was carried out in two 21-year-old, healthy and physically active women. Flight time, jump height and muscle power were evaluated by squat jump and countermovement jump tests using a contact mat, before and after the application of dynamic tape® on quadriceps and gastrocnemius muscles. Single and double taping were also used in different combinations. Results: Improvements of up to 10.8% on flight time, 22.6% on jump height and 8.9% on muscle power were observed for squat jump after the application of dynamic tape®. Conclusions: This preliminary and explo ...

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"Biology, Management, and Conservation of Lampreys in North America." In Biology, Management, and Conservation of Lampreys in North America, edited by Ulrich G. Reinhardt, Thomas Binder, and D. Gordon McDonald. American Fisheries Society, 2009. http://dx.doi.org/10.47886/9781934874134.ch6.

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<em>Abstract</em>.—Low-head barriers against invasive sea lampreys <em>Petromyzon marinus</em> in the Great Lakes are designed to maintain a minimum crest height of 30 cm and have a lip on the crest to prevent them from climbing over the barrier. We tested the ability of migratory-phase sea lampreys to scale inclined ramps with shallow (0.7–5 cm) water depth. We predicted that sea lampreys would jump the barrier and that their ability to attach would increase passage success. A recirculating flume and ramp with a vertical height of 10–30 cm and an inclination between 308 and 608 were used to evaluate lamprey climbing ability. Lampreys trying to scale the ramp were monitored by passive integrated transponder tag readers and low-light video cameras. No lampreys were observed jumping out of the water to scale a barrier. Independent of ramp angle, no fish passed over a 30-cm ramp. Lampreys often attached themselves to the ramp, but without a gain of vertical height between repeated attempts. The success rate at lower ramp heights varied between 0% (15 cm height, 308 angle) and 63% (10 cm height, 608 angle). Only ramps shorter than half the body length of the lampreys could be surmounted. Apparently, the lampreys had to have their dorso-ventral fins fully submerged in the downstream pool to create enough propulsion to scale a ramp in burst-swimming mode. An analysis of 1,300 passage attempts in a field-validation experiment showed a greater apparent motivation to move up a ramp but reconfirmed our laboratory findings on passage technique and maximum performance. We conclude that sea lamprey barrier height could be further reduced and that an overhanging lip is not necessary as sea lampreys neither climb nor jump over barriers. A ramp with a shallow inclination and moderate vertical height and water flow is a new design suggestion for a barrier that blocks sea lampreys and may allow other fish species to pass.

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Conference papers on the topic "Vertical Jump Performance"

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Umberger, Brian R., and Graham E. Caldwell. "Simulating the Independent Effects of Muscle Fiber Type Composition on Vertical Jumping Performance." In ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-176397.

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The fiber type composition of human limb muscles is believed to influence explosive movement ability. Indirect evidence is found in data from power athletes, who tend to have a greater percentage of fast twitch (FT) muscle fibers, and a lower percentage of slow twitch (ST) fibers, than endurance athletes [e.g., 1]. The apparent advantage of having a high proportion of FT fibers in explosive activities is reinforced by the existence of significant positive correlations between the percentage of FT fibers and jump height [e.g., 2].

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Dewayani, Ayu, Reni Hendrarati Masduchi, and I. Putu Alit Pawana. "Correlation Between Gluteus Maximus, Quadriceps, and Gastrocnemius Muscles Activity to Vertical Jump Performance on Male Volleyball Athletes." In International Meeting on Regenerative Medicine. SCITEPRESS - Science and Technology Publications, 2017. http://dx.doi.org/10.5220/0007321703640369.

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Utama, Endy, Damayanti Tinduh, I. Putu Alit Pawana, and Dwikora Novembri Utomo. "Relationship for Knee Angle, Hip Angle and Peak Ground Reaction Force With Vertical Jump Performance at Volleyball Athlete in Surabaya." In International Meeting on Regenerative Medicine. SCITEPRESS - Science and Technology Publications, 2017. http://dx.doi.org/10.5220/0007321003210329.

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Čillík, Ivan, and Miriam Karperová. "Eficiency of Jumping Preparation in Younger Pupils in Athletics." In 12th International Conference on Kinanthropology. Masaryk University Press, 2020. http://dx.doi.org/10.5817/cz.muni.p210-9631-2020-42.

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The aim was to find out, compare and evaluate the eficiency of take-off preparation for selected indicators of motor performance in athletes in the category of younger pupils. The monitored group consisted of 5 girls (average age 12.4 ± 0.22 year) and 4 boys (average age 12.9 ± 0.12 year) regularly participating in the training process three times a week. During 8 weeks in the racing period, take-off preparation was applied in the training pro-cess, consisting of two different batteries of take-off drills. The take-off preparation took place two to three times a week, taking into account the participation of athletes in the race. We performed the following tests to determine the eficiency of the take-off preparation to change the level of motor performance in selected indicators: 50m run, 20m cursory run, standing long jump, vertical jump with countermovement without arm swing and repeated vertical take-off drills without arm swing in 10s. We found that in the output measurement, the athletes of monitored group achieved an improvement in motor performance in tests for explosive power of lower limbs and the maximum running speed tests.

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Zakharova, Anna, and Kamiliia Mekhdieva. "Vertical Jumps Performance Analysis: Implementation of Novel Complex of Jumps." In 8th International Conference on Sport Sciences Research and Technology Support. SCITEPRESS - Science and Technology Publications, 2020. http://dx.doi.org/10.5220/0010145400900097.

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Kim, Tae Ho, Young Min Kim, Jongsung Lee, et al. "Duffing’s Vibration of a Rotor Supported on Gas Foil Bearings With Base Excitation: Measurements and Model Predictions." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-56281.

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The widespread application of gas foil bearings (GFBs) to high-performance microturbomachinery requires accurate predictions for their physical models based on experimental test data. This paper presents the experimental measurements and model predictions of Duffing’s vibration in a rotor supported on GFBs with base excitation, implemented for small oil-free turbomachinery. The rotor consisted of an impeller at one end and a thrust collar at the other end. Two gas foil journal bearings (GFJBs) located between the impeller and thrust collar supported the rotor, and one pair of gas foil thrust bearings (GFTBs) supported the thrust collar. A series of dynamic excitation tests on the rotor-GFBs system was conducted with increasing dynamic load and excitation frequency, with the rotor operating at 20,000 rpm. An electromagnetic shaker provided dynamic sine sweep loads at excitation frequencies of 10–200 Hz to the test rig base in the axial and horizontal directions. An accelerometer installed on the test rig measured the acceleration due to the dynamic loads and provided it to the shaker controller for use as a reference signal. The acceleration level was controlled to ensure a constant value, while the excitation frequency increased. During the excitation tests, two sets of orthogonally positioned eddy current sensors and one axially positioned eddy current sensor recorded the rotor’s horizontal, vertical, and axial vibrations. The test measurements demonstrated that the rotor’s vibrational motions synchronous to the shaker excitation were the most dominant. At a constant dynamic load, as the excitation frequency increased, the amplitude of the rotor motion gradually increased until it reached a certain frequency, after which it jumped down at the higher frequencies. This amplitude jump-down phenomenon became more pronounced as the dynamic load increased. In general, both the peak amplitude and jump-down frequency increased nonlinearly with the increasing dynamic loads, thus revealing the typical Duffing’s vibration. For benchmarking against the test measurements, a previously developed numerical integration of a nonlinear equation of motion (EOM) was modified to predict the rotor’s vibrational motions with base excitations to an acceleration of 9 G (gravity). This nonlinear equation uses a third-order polynomial equation that best fits the measured structural foil bearing deflection versus static load. Comparisons of the predicted synchronous amplitude and acceleration of the rotor for the increasing excitation frequencies and the predicted waterfall plot of the amplitude of the rotor motion with the test measurements showed excellent agreements, thus validating the predictive model of the rotor-GFB system with base excitation.

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Sviridov, Mikhail, Anton Mosin, Sergey Lebedev, and Ron Thompson. "VENDOR-NEUTRAL STOCHASTIC INVERSION OF LWD DEEP AZIMUTHAL RESISTIVITY DATA AS A STEP TOWARD EFFICIENCY STANDARDIZATION OF GEOSTEERING SERVICES." In 2021 SPWLA 62nd Annual Logging Symposium Online. Society of Petrophysicists and Well Log Analysts, 2021. http://dx.doi.org/10.30632/spwla-2021-0103.

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While proactive geosteering, special inversion algorithms are used to process the readings of logging-while-drilling resistivity tools in real-time and provide oil field operators with formation models to make informed steering decisions. Currently, there is no industry standard for inversion deliverables and corresponding quality indicators because major tool vendors develop their own device-specific algorithms and use them internally. This paper presents the first implementation of vendor-neutral inversion approach applicable for any induction resistivity tool and enabling operators to standardize the efficiency of various geosteering services. The necessity of such universal inversion approach was inspired by the activity of LWD Deep Azimuthal Resistivity Services Standardization Workgroup initiated by SPWLA Resistivity Special Interest Group in 2016. Proposed inversion algorithm utilizes a 1D layer-cake formation model and is performed interval-by-interval. The following model parameters can be determined: horizontal and vertical resistivities of each layer, positions of layer boundaries, and formation dip. The inversion can support arbitrary deep azimuthal induction resistivity tool with coaxial, tilted, or orthogonal transmitting and receiving antennas. The inversion is purely data-driven; it works in automatic mode and provides fully unbiased results obtained from tool readings only. The algorithm is based on statistical reversible-jump Markov chain Monte Carlo method that does not require any predefined assumptions about the formation structure and enables searching of models explaining the data even if the number of layers in the model is unknown. To globalize search, the algorithm runs several Markov chains capable of exchanging their states between one another to move from the vicinity of local minimum to more perspective domain of model parameter space. While execution, the inversion keeps all models it is dealing with to estimate the resolution accuracy of formation parameters and generate several quality indicators. Eventually, these indicators are delivered together with recovered resistivity models to help operators with the evaluation of inversion results reliability. To ensure high performance of the inversion, a fast and accurate semi-analytical forward solver is employed to compute required responses of a tool with specific geometry and their derivatives with respect to any parameter of multi-layered model. Moreover, the reliance on the simultaneous evolution of multiple Markov chains makes the algorithm suitable for parallel execution that significantly decreases the computational time. Application of the proposed inversion is shown on a series of synthetic examples and field case studies such as navigating the well along the reservoir roof or near the oil-water-contact in oil sands. Inversion results for all scenarios confirm that the proposed algorithm can successfully evaluate formation model complexity, recover model parameters, and quantify their uncertainty within a reasonable computational time. Presented vendor-neutral stochastic approach to data processing leads to the standardization of the inversion output including the resistivity model and its quality indicators that helps operators to better understand capabilities of tools from different vendors and eventually make more confident geosteering decisions.

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Reports on the topic "Vertical Jump Performance"

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Li, Qiang, Qiang Ye, and Tianya Cao. Acute effects of dynamic stretching, static stretching on vertical jump and sprint performance - meta analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, 2021. http://dx.doi.org/10.37766/inplasy2021.6.0002.

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