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Walter J. Rejeski and Paul M. Ribisl

The purpose of this study was to examine the effects of anticipated task duration on ratings of perceived exertion during treadmill running. Male subjects.(N = 15) completed two separate runs on a motor-driven treadmill at 85% V02 max. During one trial, subjects ran for a period of 20 minutes, while for a second trial, subjects were led to believe that they would be running for 30 minutes. In each case, the trials were terminated at the 20-minute mark. Ratings of perceived exertion, heart rates, respiratory rates, and ventilatory minute volumes were collected across each trial. Results supported the supposition that the anticipation of continued performance mediated ratings of effort expenditure. This effect was obtained only during moderate work levels and was in contrast to research examining mental fatigue.

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Ed Maunder, Andrew E. Kilding and Simeon P. Cairns

The manifestations of fatigue during fast bowling in cricket were systematically evaluated using subjective reports by cricket experts and quantitative data published from scientific studies. Narratives by international players and team physiotherapists were sourced from the Internet using criteria for opinion-based evidence. Research articles were evaluated for high-level fast bowlers who delivered 5- to 12-over spells with at least 1 quantitative fatigue measure. Anecdotes indicate that a long-term loss of bowling speed, tiredness, mental fatigue, and soreness occur. Scientific research shows that ball-release speed, bowling accuracy, bowling action (technique), run-up speed, and leg-muscle power are generally well maintained during bowling simulations. However, bowlers displaying excessive shoulder counterrotation toward the end of a spell also show a fall in accuracy. A single notable study involving bowling on 2 successive days in the heat showed reduced ball-release speed (–4.4 km/h), run-up speed (–1.3 km/h), and accuracy. Moderate to high ratings of perceived exertion transpire with simulations and match play (6.5–7.5 Borg CR-10 scale). Changes of blood lactate, pH, glucose, and core temperature appear insufficient to impair muscle function, although several potential physiological fatigue factors have not been investigated. The limited empirical evidence for bowling-induced fatigue appears to oppose player viewpoints and indicates a paradox. However, this may not be the case since bowling simulations resemble the shorter formats of the game but not multiday (test match) cricket or the influence of an arduous season, and comments of tiredness, mental fatigue, and soreness signify phenomena different from what scientists measure as fatigue.

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Kim Gammage, Rachel Arnold, Lori Dithurbide, Alison Ede, Karl Erickson, Blair Evans, Larkin Lamarche, Sean Locke, Eric Martin and Kathleen Wilson

behavior. Self and Identity, 18, 227–246. doi: 10.1080/15298868.2018.1436084 Journal website: Author website: Mental Fatigue Research: Where Do Things Stand and Where Do They Need to Go? Mental fatigue is

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Franco M. Impellizzeri, Samuele M. Marcora and Aaron J. Coutts

fatigue increases both heart rate and rating of perceived exertion, 24 whereas mental fatigue increases only rating of perceived exertion. 25 This knowledge may help to choose the most appropriate intervention to reduce fatigue, for example, a reduction in muscle-damaging exercise or better sleep

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Thomas Finkenzeller, Sabine Würth, Michael Doppelmayr and Günter Amesberger

of the used Eriksen task leading to almost no errors. In the future, more complex Eriksen tasks that provoke more errors could be used to prove the robustness of the present results. The observed higher error rate on the congruent stimuli might be an effect of mental fatigue ( Lorist et al., 2000

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Michael Kellmann, Maurizio Bertollo, Laurent Bosquet, Michel Brink, Aaron J. Coutts, Rob Duffield, Daniel Erlacher, Shona L. Halson, Anne Hecksteden, Jahan Heidari, K. Wolfgang Kallus, Romain Meeusen, Iñigo Mujika, Claudio Robazza, Sabrina Skorski, Ranel Venter and Jürgen Beckmann

evaluated regeneration approaches encompass strategies such as cold-water immersion (CWI) and sleep. 4 In contrast, mental fatigue (ie, cognitive exhaustion) can mainly be compensated by using psychological recovery strategies such as cognitive self-regulation, resource activation, and psychological

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Oliver R. Barley, Dale W. Chapman, Georgios Mavropalias and Chris R. Abbiss

result of an altered mood state and reduced mental fatigue. 8 Indeed, within-condition differences in depression, confusion, and vigor observed preacclimation that were not present postacclimation would suggest a greater psychological strain, as well as the significantly lower perception of fatigue

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Eva Piatrikova, Ana C. Sousa, Javier T. Gonzalez and Sean Williams

even to mental fatigue. 23 Whether, the conventional methods represents the gold standard method for the estimation of D ′ in swimming is questionable. Indeed, the original method for deriving CS and D ′ from the DT model is based on the assumption that the energy cost of transport is constant as

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Teun van Erp, Carl Foster and Jos J. de Koning

measurements of TL. Furthermore, stage races can take up to 10 days of racing without a rest day, and it could be possible that accumulating physical or mental fatigue makes this relationship weaker during road races. However, there is still a very large relationship between sRPE and other measures of TL

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Maxime Deshayes, Corentin Clément-Guillotin and Raphaël Zory

activities (for a review, see Morishita et al., 2013 ). This relationship is very sensitive and may be influenced by exposure to psychological and environmental factors during energy expenditure tasks, such as self-task motivation ( Blanchfield, Hardy, de Morree, Staiano, & Marcora, 2014 ) or mental fatigue