Impact of Repeated Acute Exposures to Low and Moderate Exercise-Induced Hypohydration on Physiological and Subjective Responses and Endurance Performance
Deshayes TA, Daigle N, Jeker D, Lamontagne-Lacasse M, Perreault-Briere M, Claveau P, Simoneau IL, Chamoux E, Goulet EDB
Nutrients · 3 citations
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
- Independent funding
- Government
- Canadian Government
Based on 1 listed funder(s) and full-text disclosure statement.
Publication
- Published
- 2021-12-15 · Nutrients · vol. 13 · issue 12 · p. 4477
- Publisher
- Multidisciplinary Digital Publishing Institute
- Cited
- 6 citations · more than 61% of similar papers · 0.5× the field average
- References
- 55 works
- Access
- Open access (journal) · CC-BY
- Research areas
- Thermoregulation and physiological responses · Exercise and Physiological Responses · Muscle metabolism and nutrition
- Keywords
- Crossover study, Medicine, Heart rate, Time trial, Physical therapy, Randomized controlled trial, Endurance training, Perceived exertion, Rating of perceived exertion, Internal medicine, Blood pressure
- MeSH
- humans, dehydration, exercise, body temperature regulation, heart rate, drinking, physical endurance, running, female, male, young adult
9 authors
From CA
- Thomas A. DeshayesUniversité de Sherbrooke
- Nicolas DaigleUniversité de Sherbrooke
- David JekerUniversité de Sherbrooke
- Martin Lamontagne-LacasseUniversité de Sherbrooke
- Maxime Perreault-BriereUniversité de Sherbrooke
- Pascale ClaveauUniversité de Sherbrooke
Abstract
This study aimed to examine whether repeated exposures to low (2%) and moderate (4%) exercise-induced hypohydration may reverse the potentially deleterious effect of hypohydration on endurance performance. Using a randomized crossover protocol, ten volunteers (23 years, V˙O2max: 54 mL∙kg-1∙min-1) completed two 4-week training blocks interspersed by a 5-week washout period. During one block, participants replaced all fluid losses (EUH) while in the other they were fluid restricted (DEH). Participants completed three exercise sessions per week (walking/running, 55% V˙O2max, 40 °C): (1) 1 h while fluid restricted or drinking ad libitum, (2) until 2 and (3) 4% of body mass has been lost or replaced. During the first and the fourth week of each training block, participants completed a 12 min time-trial immediately after 2% and 4% body mass loss has been reached. Exercise duration and distance completed (14.1 ± 2.7 vs. 6.9 ± 1.5 km) during the fixed-intensity exercise bouts were greater in the 4 compared to the 2% condition (p p < 0.05) with DEH than EUH, and training did not change these outcomes. Exercise-induced hypohydration of 2% and 4% body mass impaired time-trial performance in a practical manner both at the start and end of the training block. In conclusion, exercise-induced hypohydration of 2% and 4% body mass impairs 12 min walking/running time-trial, and repeated exposures to these hypohydration levels cannot reverse the impairment in performance.
Abstract via Europe PMC. Copyright remains with the authors or publisher (CC BY).
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