The Influence of Heat Acclimation and Hypohydration on Post-Weight-Loss Exercise Performance
Barley OR, Chapman DW, Mavropalias G, Abbiss CR
International journal of sports physiology and performance · 3 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 (indexed by PubMed)
- Studied in
- People
- Main outcome
- Health markers and function
Who paid for it
- Funding
- Funding not disclosed
Publication
- Published
- 2019-05-16 · Int J Sports Physiol Perform · vol. 15 · issue 2 · pp. 213–221
- Publisher
- Human Kinetics
- Cited
- 11 citations · more than 56% of similar papers · 0.2× the field average
- References
- 34 works
- Access
- Paywalled
- Research areas
- Thermoregulation and physiological responses · Exercise and Physiological Responses · Muscle metabolism and nutrition
- Keywords
- Acclimatization, Sprint, Medicine, Animal science, Time trial, Crossover study, Physical therapy, Internal medicine, Placebo, Biology, Heart rate, Blood pressure, Ecology
- MeSH
- humans, dehydration, weight loss, affect, cognition, task performance and analysis, acclimatization, blood pressure, heart rate, drinking, male, athletic performance, hot temperature
4 authors
- Oliver R. Barley
- Dale W. Chapman
- Georgios Mavropalias
- Chris R. Abbiss
Abstract
Purpose
To examine the influence of fluid intake on heat acclimation and the subsequent effects on exercise performance following acute hypohydration.
Methods
Participants were randomly assigned to 1 of 2 groups, either able to consume water ad libitum (n = 10; age 23 [3] y, height 1.81 [0.09] m, body mass 87 [13] kg; HAW) or not allowed fluid (n = 10; age 26 [5] y, height 1.76 [0.05] m, body mass 79 [10] kg; HANW) throughout 12 × 1.5-h passive heat-acclimation sessions. Experimental trials were completed on 2 occasions before (2 baseline trials) and 1 following the heat-acclimation sessions. These sessions involved 3 h of passive heating (45°C, 38% relative humidity) to induce hypohydration followed by 3 h of ad libitum food and fluid intake after which participants performed a repeat sled-push test to assess physical performance. Urine and blood samples were collected before, immediately, and 3 h following hypohydration to assess hydration status. Mood was also assessed at the same time points.
Results
No meaningful differences in physiological or performance variables were observed between HANW and HAW at any time point. Using pooled data, mean sprint speed was significantly (P < .001) faster following heat acclimation (4.6 [0.7] s compared with 5.1 [0.8] s). Furthermore, heat acclimation appeared to improve mood following hypohydration.
Conclusions
Results suggest that passive heat-acclimation protocols may be effective at improving short-duration repeat-effort performance following acute hypohydration.
Abstract via Europe PMC. Copyright remains with the authors or publisher.
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