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Dissertations / Theses on the topic 'Fatigue – Physiological aspects'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Vaile, Joanna. "Effect of hydrotherapy on recovery of muscle-damage and exercise-induced fatigue." University of Western Australia. School of Sport Science, Exercise and Health, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0221.

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Achieving adequate and appropriate recovery from exercise is essential in ensuring optimal performance during repeated bouts of exercise. The use of various recovery interventions has become popular in an attempt to enhance subsequent performance and accelerate post-exercise recovery. The application of various post-exercise hydrotherapy interventions has become increasingly popular, however, the majority of current recovery practices appear to be based largely on anecdotal evidence as opposed to rigorous scientific research or evidence based findings. Physiologically, various hydrotherapy pro

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2

Kirwan, John P. "Training overload : carbohydrate balance and muscular fatigue." Virtual Press, 1987. http://liblink.bsu.edu/uhtbin/catkey/530363.

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This study was designed to investigate the relationship between dietary carbohydrate consumption and muscle glycogen storage during five days of intense training. Ten highly trained distance runners performed two diet-training regimens. Training consisted of running 1.5 times each runner's average daily training distance (~20 km) at ~80% Vo2 max. During one of these intense training periods the runners ate slightly more carbohydrate (8.0 g•kg•d-1) than was required to meet the energy requirements of exercise and normal activity (EQ-CHO). During the second regimen (LO-CHO) the runners ate appr

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3

Moreau, Kerrie L. "The effects of blood lactate concentration on perception of effort during exercise." Virtual Press, 1996. http://liblink.bsu.edu/uhtbin/catkey/1014847.

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Several studies have reported that rating of perceived exertion (RPE) covaries more with blood lactate concentration (BLC) than other measures of relative exercise intensity. If BLC is used as the intensity criterion, then RPE could be used as a valid tool for exercise prescription. However, few have shown the relationship between RPE and BLC across a variety of graded exercise tests (GXTs) and exercise training settings. The purpose of this study was to determine if differences exist in RPEs at matched BLC between two GXTs and steady state exercise in the field setting. Thirteen healthy males

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4

Tallis, J. "Effects of physiological caffeine concentration on isolated skeletal muscle force, power and fatigue resistance." Thesis, Coventry University, 2013. http://curve.coventry.ac.uk/open/items/456841df-8168-4338-9877-61b3ec64de52/1.

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Caffeine is the most widely consumed socially acceptable drug in the world and is commonly used for its ergogenic properties with demonstrated performance enhancing effects in endurance, power and strength based activities. Despite a wealth of evidence concluding a caffeine induced performance benefit, the direct effects of the drug on peripheral physiological processes have not been fully examined. Early works showed high dose caffeine has direct force potentiating effect on skeletal muscle, a notion that has only recently been confirmed by James et al. (2005) to also occur at a maximal human

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5

De, Gray Birch Casey. "The effects of sustained attention, workload and task-related fatigue on physiological measures and performance during a tracking task." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1005198.

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Despite extensive research into the concept of mental fatigue there is as yet no “gold standard” definition or measurement technique available. Because of this a large amount of fatigue-related errors are still seen in the workplace. The complexity of the problem lies with the inability to directly measure mental processes as well as the various endogenous and exogenous factors that interact to produce the experienced fatigue. Fatigue has been divided into sleep-related and task-related fatigue; however the task-related aspect is evident both during normal waking hours as well as during period

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6

Joiner, Alexander Jason. "Time course of performance changes and fatigue markers during training for the ironman triathlon." Thesis, Rhodes University, 2010. http://hdl.handle.net/10962/d1005212.

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Suboptimal preparation for the Ironman triathlon can have detrimental effects on mental and physical condition. The purpose of this longitudinal investigation was to examine the relationship between a number of performance changes and fatigue markers during training for an Ironman as well as immediately after the event, in an attempt to better understand the effects of ultraendurance training. Eighteen athletes training for the Ironman; South Africa, 2009 were recruited for the study. Over the 6 month data collection period body mass, training load (TRIMP and Session x RPE methods), physiologi

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7

Lee, Kangsoo, and 李岡洙. "Using EEG methodology to examine the effect of exercise induced fatigue on the direction of attention during motor skill performance." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206744.

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Exercise induced fatigue can have a negative impact on motor skill performance. While part of the decline is attributable to physiological factors that directly influence the coordination of movement, psychological factors may also contribute. Typically, motor learning environments encourage the accumulation of task-relevant declarative knowledge, which can be depended on to consciously support performance. The literature suggests that skills learnt in this way are vulnerable to demanding performance environments, including those in which the performer is fatigued. Recent empirical work has de

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8

Weinhandl, Joshua T. "The effect of repetitive drop jumps on landing mechanics." Virtual Press, 2007. http://liblink.bsu.edu/uhtbin/catkey/1372055.

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The purpose of the study was to investigate the effects of fatigue on the lower extremity landing strategies of males and females. Twelve recreationally active males (n = 6) and females (n = 6) (nine used for analysis) performed repetitive drop jumps until they could no longer reach 20% of their initial drop jump height. Kinematic and kinetic variables were assessed during the impact phase of all jumps. At initial ground contact, males exhibited greater extension at the hip and knee and less plantar flexion than females. However, females performed more eccentric work during the impact phase of

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9

Ndaki, Ntombikayise. "Investigation of the effect of short duration breaks in delaying the onset of performance related fatigue during long distance monotonous driving at different times of the day." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1016353.

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Road traffic accidents are a serious burden to the health systems of many countries especially in South Africa. Research aimed at reducing traffic related accidents is of importance as traffic crashes are rated as the second leading cause of fatalities in South Africa and ninth in the world. Despite the extensive efforts into research and development of new technology, driver fatigue still remains a cause of vehicle accidents worldwide. Fatigue plays a role in up to 20% of vehicle accidents with many being serious or fatal. Numerous coping behaviours are employed by drivers to counteract the n

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10

Wu, Shing. "The occurrence of core muscle fatigue during high-intensity running exercise and its limitation to performance : the role of respiratory work." HKBU Institutional Repository, 2012. https://repository.hkbu.edu.hk/etd_ra/1382.

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11

Barnett, Christopher. "The effect of L-carnitine supplementation on blood and muscle lactate accumulation during high intensity sprint cycling exercise." Virtual Press, 1993. http://liblink.bsu.edu/uhtbin/catkey/865941.

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This study examined the effects of 14 days of L-carnitine supplementation on blood and muscle lactate concentrations, and carnitine fractions, during high intensity sprint cycling exercise. Eight subjects performed three experimental trials - control I (CON I, 0 days), control II (CON II, 14 days), and L-carnitine (LCN, 28 days). Each trial consisted of a 4 min ride at 90% VO2max, followed by a rest period of 20 min, and then 5 x 1 min rides at 115% VO2max (2 min restbetween each). Following CON II, all subjects began dietary supplementation of L-carnitine for a period of 14 days (4 g/day). L-

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12

Shorten, James. "Relationships between sprint performance, power output and fatigue." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-03022010-020148/.

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13

McCarthy, Pollyanna R. "Influence of fatigue and dietary manipulation strategies on skilled tennis hitting performance." Thesis, Loughborough University, 1997. https://dspace.lboro.ac.uk/2134/7423.

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14

Anderson, Cindy S. "Ventilatory and lactate thresholds in boys and men." Virtual Press, 2001. http://liblink.bsu.edu/uhtbin/catkey/1222827.

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The purpose of this study was to examine VT and LT in boys and men. Eight boys (10-11 years) and nine men (18-30 years) completed a graded exercise test on a cycle ergometer. A two-way (group x threshold) ANOVA compared physiological responses (V02 1/min and ml/kg/min, percentage of V02max, and HR) at VT and LT. Statistical significance was set at P < 0.05. No significant interaction was observed. Significant main effects for group included a higher V02 (1/min) in the men, and a higher percentage of VO2max in the boys. Significant main effects for threshold showed all variables were greater at

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15

Hutchinson, Martha L. "The effect of fatigue on the accuracy of jump shot performance in female college basketball players." Scholarly Commons, 1991. https://scholarlycommons.pacific.edu/uop_etds/2213.

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The purpose of this study was to investigate the effects of fatigue on the accuracy and selected biomechanic variables of jump shot performance. Five subjects were filmed with two high speed cine cameras during pre-fatigue and post-fatigue conditions. The accuracy data were acquired by recording the results of thirty pre-fatigue and thirty post-fatigue, fifteen foot jump shots. The biomechanical data were gathered from film records of every third trial in the pre-fatigue and post-fatigue shooting. Biomechanical analysis variables were acquired using a ten point body model. With these data the

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16

Chan, Suet-mui Jessie, and 陳雪梅. "The psychosocial and physiological effects of Qigong exercise in integrative medicine : a study of Chinese patients with chronic fatigue syndrome-like illness." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206424.

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17

Chaplin, Caley. "The factors affecting self-regulation through the analysis of physiological, psychological and behavioural measures during task-switching." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1006027.

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Individuals are required to manage multiple tasks which require strategic allocation of time and effort to ensure goals are reached efficiently. By providing the worker with autonomy over their work, performance and worker well-being have improved. This increased control allows individuals to organize work according to the needs of the body, which prevents fatigue leading to improved productivity. When given the option, humans tend to switch between tasks frequently. This behaviour can be used to determine the change in self-regulation strategies. An understanding of human task-switching behav

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18

Clanton, Tameka A. "Prophylactic ankle stabilizers and their effect on lower extremity landing mechanics during drop jump landings to fatigue." Muncie, Ind. : Ball State University, 2009. http://cardinalscholar.bsu.edu/644.

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19

Kroff, Jacolene. "The relationship between respiratory muscle fatigue, core stability, kinanthropometric attributes and endurance performance in competitive kayakers." Thesis, Link to the online version, 2005. http://hdl.handle.net/10019/1079.

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20

Tau, Sethunya Harriet Hlobisa. "An analysis of regulatory mechanisms during sustained task execution in cognitive, motor and sensory tasks." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1006806.

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Fatigue is a state that, although researched for many years, is still not completely understood. Alongside this lack of a general understanding of fatigue is a lack of knowledge on the processes involved in the regulation of fatigue. The existing theories relating to regulation are focussed on mental effort regulation, suggesting that performance outcomes are co-ordinated by effort regulation that functions by making alterations to physiological processes and strategic adjustments at a cognitive level in response to cognitive demands and goals. Since fatigue is a multi-dimensional construct wi

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21

Shi, Yan. "A comparative study on the treatment of exercise induced fatigue between qi-supplementing herbs and qi-rectifying herbs." HKBU Institutional Repository, 2002. http://repository.hkbu.edu.hk/etd_ra/429.

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22

Louw, Tyron Linton. "An investigation into control mechanisms of driving performance : resource depletion and effort-regulation." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1001842.

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Driver fatigue is a complex phenomenon that has a range of causal factors including sleeprelated and task-related factors. These manifest as different safety and performance outcomes. Extensive research has been applied to linking these factors to performance impairment. However, little research focuses on the mechanisms by which this link exists. This research project therefore focuses on the processes underlying how driving performance is controlled and maintained during the development on non-sleep-related driver fatigue. The main aim was to establish whether progressive impairment of drivi

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23

Robertson, Jade Kelly. "Peripheral vision field fatigue during simulated driving : the effects of time on task and time of day on selected psychophysiological, performance and subjective responses." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1007136.

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Worldwide, motor accidents are responsible for a large number of deaths and disabilities (Connor et al., 2001), and one of the major causes of motor accidents is driver fatigue. Although majority of drivers are aware of the dangers of fatigued driving, accidents related to this continues to contribute to a large percentage of all accidents, between 5 and 50% (Nilsson et al., 1997; Williamson et al., 2011). The purpose of the research was to establish the effect that fatigue renders on an individual’s peripheral visual field and to determine whether a decrement in driving performance occurs at

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24

Petaishiski, Jayme Nichole. "The buffering effects of perceived fitness on stress reactivity." CSUSB ScholarWorks, 2002. https://scholarworks.lib.csusb.edu/etd-project/2212.

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This study addresses the effects of the changing workforce and the physiological and psychological benefits of fitness. The purpose of this experiment is to test the relationship between situational stressors, perceived fitness, exercise locus of control, self-control, and perceived stress.

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25

Barford, Gareth Charles. "Changes in muscle recruitment, functional strength and ratings of perceived effort during an 8-over bowling spell: impact on performance." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1003926.

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Background: The musculoskeletal demands placed on the lower limb musculature of fast bowlers over time have not received much attention. In particular, measures of muscle recruitment changes have, to the author’s knowledge, not been considered. Objective: The present study, therefore sought to establish any associations between an eight over, simulated fast bowling spell, and muscle activation patterns, power output, perceptual demands, and changes in performance. This will enable improvements in the development of training programmes. Methods: Players’ were required to attend two sessions in

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26

Carten, Cecile. "The relationship between anthropometry and respiratory muscle function in land- and water-based athletes." Thesis, Stellenbosch : Stellenbosch University, 2007. http://hdl.handle.net/10019.1/21735.

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Thesis (MASpor)--University of Stellenbosch, 2007.<br>ENGLISH ABSTRACT: The purpose of this study was to gain more information on respiratory muscle function of team sports. This was achieved by determining the relationship between anthropometry and respiratory muscle function and the relationship between respiratory muscle function and exercise performance. The degree of respiratory muscle fatigue after a speed endurance test on land and in water was also determined. A total of 62 subjects were tested. The group consisted of 14 netball players (age: 20.9 ± SD 2.0 years; height: 172.5 ±

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27

Carbajal, Ivan. "An Investlarks and Hearts: Circadian Mismatch and Effort Intensity." Thesis, University of North Texas, 2018. https://digital.library.unt.edu/ark:/67531/metadc1157572/.

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My experiment concerned the influence of chronobiological (circadian) rhythm on fatigue, effort, and cardiovascular (CV) response. It evaluated responses of morning people (Larks) presented an easy or difficult recognition memory task at a time congruent or incongruent with their rhythm. Based on an extension of a conceptual analysis of fatigue influence, my central prediction was that circadian rhythm would combine interactionally with task difficulty to determine effort and associated CV responses. Specifically, effort and associated CV responses were expected to be (1) positively correspo

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28

Benwell, Nicola Mae. "The cortical response to fatiguing exercise : studies of intracortical inhibition, interventional brain stimulation and cerebral haemodynamics." University of Western Australia. Faculty of Medicine and Dentistry and Health Sciences, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0062.

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[Truncated abstract] A reduction in the force-generating capacity of a muscle is the primary indicator of fatigue and the majority of this force loss is the result of peripheral fatigue. However, there is also evidence that the central nervous system (CNS) does not drive muscles maximally during fatiguing exercise, which has led to the concept of central fatigue. The strongest evidence for this comes from interpolated twitch studies showing that transcranial magnetic stimulation (TMS) during a maximal voluntary contraction can produce an increment in force which becomes greater as fatigue deve

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29

Klass, Malgorzata. "Contribution à l'étude de l'effet du vieillissement sur la fonction neuromusculaire." Doctoral thesis, Universite Libre de Bruxelles, 2007. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209224.

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Résumé en français :<p>L’objectif de nos investigations a été d’étudier, chez le sujet humain, les mécanismes responsables de l'altération des performances motrices au cours du vieillissement. La première étude était destinée d’une part, à comparer la diminution maximale de force observée dans les différents régimes de contraction et, d’autre part, à contribuer à la compréhension des mécanismes à l’origine de la meilleure préservation de force pour le régime excentrique. Etant donné que jusqu’à présent, seuls des facteurs musculaires avaient été proposés afin d’expliquer les différences exista

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30

Carmichael, Kaitlyn E. "Effects of a Single Bout of Exercise on Neurocognitive Function following Acute Sleep Restriction." Thesis, University of North Texas, 2018. https://digital.library.unt.edu/ark:/67531/metadc1248395/.

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Acute sleep loss may lead to elevated fatigue, decreased energy, and diminished cognitive performance. Traditionally, sleep extension is used to restore mood and cognitive function to baseline levels following insufficient sleep, yet this method may not be feasible or preferred. Acute exercise may serve as an affordable and relatively safe intervention to reduce detriments to daytime functioning following sleep loss. The primary purpose of this study was to examine the effects of moderate-intensity aerobic exercise on neurocognitive function following acute sleep restriction. A secondary aim w

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31

Schornstein, Barbara J. "Biomechanical adjustments over time of an exhaustive run : comparison of compression tights and running shorts." 2011. http://liblink.bsu.edu/uhtbin/catkey/1661178.

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Fatigue induces changes to running form; therefore movement is not as effective or efficient. Reducing the amount of fatigue or its effects on form would be ideal to improve performance while running. Compressive clothing has unknown effects on musculature, however it claims to reduce fatigue. The aim of this study was to see the changes in running form while running to exhaustion and to see how compression tights can effect these changes. Eleven runners ran at their current five-kilometer race pace on a treadmill to voluntary exhaustion in a repeated measures design wearing compression tights

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32

Fletcher, Adam. "Measurement and management of work-related fatigue development and preliminary validations of predictive model." 1999. http://arrow.unisa.edu.au:8081/1959.8/25025.

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Expectations from industry and the community ensure that we live in a 24-hour society. Increased demand for flexibility, capital utilisation and competition have initiated or extended shiftwork operations in many industry sectors such as mining, transport, defence, healthcare, manufacturing and security. The most common problems reported by shiftworkers are disturbed sleep and sleepiness. From a biological perspective this is not surprising because shiftworkers are often required to work at times when their mind and body are driven toward sleep. Shiftworkers may therefore be required to attemp

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33

Doucet, Barbara Mollere 1961. "Electrical stimulation and neuromuscular fatigue in healthy and chronic post-stroke populations." Thesis, 2007. http://hdl.handle.net/2152/3472.

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Neuromuscular electrical stimulation (NMES) has been shown to be effective for recovery of motor function following injury or pathology, however, NMES can impart rapid fatigue and the specific parameters of stimulation that maximize force output and delay the onset of fatigue remain unclear. Frequency, intensity, and pulse pattern are a few of the parameters that can be manipulated to achieve desired outcomes. Strong evidence supports the use of higher frequencies of stimulation to maximize performance of fatigued or paralyzed muscle. Likewise, several studies advocate the use of varied pulse

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34

McLean, Blake David. "Changes in maximal power output and perceptual fatigue responses during a Division I female collegiate soccer season." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-05-3185.

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The purpose of this study was to investigate how maximal power output (P[subscript max]), as measured via the inertial load technique, changes throughout a collegiate soccer season in relation to training load completed. Furthermore, this study also aimed to describe the time course of recovery of [maximal power output] following two collegiate soccer matches in one weekend. The current investigation involved two experimental periods. The first took place throughout the 2010 Big XII soccer season. Nineteen Division I female collegiate soccer players (19.9 ± 1.2 yrs, 165.1 ± 6.6 cm, 61.0 ± 6.8

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35

"The impact of shift, circadian typology, and bright light exposure on sleepiness, vigilance, and driving performance in Hong Kong taxi drivers." 2005. http://library.cuhk.edu.hk/record=b5892685.

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Lo Chi-yan.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 2005.<br>Includes bibliographical references (leaves 42-51).<br>Abstract in English and Chinese; questionnaires in Chinese.<br>Abstract --- p.i<br>Acknowledgments --- p.iv<br>Table of Contents --- p.v<br>Chapter CHAPTER 1 --- Introduction --- p.1<br>Why is empirical research on driver sleepiness important? --- p.2<br>Prevalence of driver sleepiness --- p.2<br>Driver sleepiness as a risk factor for traffic accidents --- p.3<br>Why should taxi driver sleepiness be studied? --- p.6<br>Variations in sleepiness and vigilance

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