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Postexercise water immersion increases short-term food intake in trained men
Rhiannon E Halse1, Karen E Wallman, Kym J Guelfi
1School of Sport Science, Exercise and Health, The University of Western Australia, Perth, Western Australia, Australia. halser01@student.uwa.edu.au
Medicine and Science in Sports and Exercise
|August 28, 2010
Summary
Postexercise cold water immersion (CWI) and neutral water immersion (NWI) significantly increase subsequent energy intake in trained men. Athletes should consider this effect when using water immersion for exercise recovery.
Area of Science:
- Exercise Physiology
- Sports Science
- Nutrition Science
Background:
- Cold water immersion (CWI) post-exercise may influence subsequent energy intake.
- CWI can reduce leptin, a satiety hormone, potentially affecting appetite.
- The acute impact of post-exercise CWI on athlete energy intake requires investigation.
Purpose of the Study:
- To investigate the acute effects of post-exercise CWI on subsequent energy intake.
- To examine the impact on macronutrient preferences and appetite-related hormones.
- To compare CWI with neutral water immersion (NWI) and a resting control (CON).
Main Methods:
- Ten physically active men underwent three randomized trials: CWI (15°C), NWI (33°C), or CON.
- Each trial included 40 min of treadmill running followed by 20 min of immersion or rest.
- Participants consumed a buffet breakfast ad libitum post-intervention.
Main Results:
- Energy intake was significantly higher after both CWI and NWI compared to CON.
- No significant difference in energy intake was observed between CWI and NWI.
- Changes in energy intake correlated with significant interactions in leptin and active ghrelin levels.
Conclusions:
- Post-exercise water immersion, both cold and neutral, increases subsequent energy intake in trained men.
- This finding is crucial for athletes utilizing water immersion for exercise recovery.
- Hormonal changes in leptin and ghrelin may mediate these effects on appetite.
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