Two percent hypohydration does not impair self-selected high-intensity intermittent exercise performance
Yamashita N, Ito R, Nakano M, Matsumoto T
Journal of strength and conditioning research · 4 citations
Review labels
Neutral facts our review recorded about how this study was done. They describe method, never whether we like the result.
How it was studied
- Design
- Randomized controlled trial (classified by our AI screen)
- Studied in
- People
- Main outcome
- Health markers and function
Who paid for it
- Funding
- Funding not disclosed
Publication
- Published
- 2014-06-25 · J Strength Cond Res · vol. 29 · issue 1 · pp. 116–125
- Publisher
- Lippincott Williams & Wilkins
- Cited
- 8 citations · more than 62% of similar papers · 0.3× the field average
- References
- 37 works
- Access
- Paywalled
- Research areas
- Thermoregulation and physiological responses · Exercise and Physiological Responses · Muscle metabolism and nutrition
- Keywords
- Physical therapy, Intensity (physics), Physical medicine and rehabilitation, Psychology, Medicine, Gerontology, Physics
- MeSH
- humans, dehydration, fever, exercise test, body temperature, exercise, random allocation, anaerobic threshold, boxing, male, hot temperature, young adult
4 authors
From JP
- Naoyuki Yamashita · correspondingNihon Fukushi University; Aichi Toho University; Chukyo University
- Ryo ItoNihon Fukushi University; Aichi Toho University; Chukyo University
- Masataka NakanoNihon Fukushi University; Aichi Toho University; Chukyo University
- Takaaki MatsumotoNihon Fukushi University; Aichi Toho University; Chukyo University
Abstract
The level of hypohydration at which power output during intermittent exercise performance starts to decrease is not fully understood. The purpose of this study was to investigate the effects of 2% hypohydration without hyperthermia on intermittent exercise performance. Eight collegiate amateur boxers completed 2 exercise tests. On day 1, subjects hypohydrated by 2% of body mass by exercising in a hot environment, and on day 2, subjects performed intermittent exercise (4 × 2 minute per round [R] separated by 1-minute recovery) under a randomly assigned condition of with (HYP) or without (EUH) hypohydration. Each bout consisted of 8 × 5 seconds of maximal cycling exercise (0.05 kp × body mass) separated by 10 seconds of passive recovery. Mean power output per kilogram (MPO), total power output per kilogram (TPO), energy system relative contribution, and core rectal temperature (Tre) were measured. Changes in body mass before the exercise tests were -2.25 ± 0.18% (HYP) and -0.17 ± 0.19% (EUH) (p < 0.001). Mean power output, TPO, and each energy contribution ratio were not significantly different between the trials, and pre- and postexercise test Tre did not differ significantly between trials. Results demonstrated that approximately 2% hypohydration lies below the point at which power output during intermittent exercise starts to decline.
Abstract via Europe PMC. Copyright remains with the authors or publisher.
Community trust
Loading…
How much do you trust this study's findings?
Comments
Sign in to rate, comment on or flag this study.Sign inSomething wrong here?
Flag this study if its information, labels or funding look wrong. An editor reviews every flag.
Sign in to rate, comment on or flag this study.Sign inEducational information about published research. Not medical advice, and not a recommendation to start or stop anything.