King Grub
2010-08-28, 13:05
PURPOSE: The performance of exercise while immersed in cold water has been shown to influence energy intake in the subsequent meal. In addition, cold water immersion itself has been shown to reduce the concentration of the hormone leptin, high concentrations of which signal satiety. Taken together, these findings raise the question of whether the common practice of post-exercise cold water immersion (CWI) by athletes acutely affects energy intake. Hence, this study investigated the acute effect of CWI following exercise on subsequent energy intake and macronutrient preferences, as well as the circulating levels of a range of appetite-related hormones.
METHODS: Ten physically active males participated in three randomised, counterbalanced trials consisting of 40 min of treadmill running (70% V O2peak), followed by 20 min of either cold water immersion (CWI: 15 degrees C); neutral water immersion (NWI: 33 degrees C) or a resting control with no immersion (CON). Participants were then given 30 min access to a buffet-type breakfast of precisely known quantity and nutrient composition from which they could consume ad libitum.
RESULTS: Participants consumed significantly more energy following both CWI (4893+/-1554 kJ, p=0.006) and NWI (5167+/-1975 kJ, p=0.010) compared to CON (4089+/-1585 kJ). However, there was no significant difference in total energy intake between the CWI and NWI trials (p=0.595). These changes were associated with a significant interaction effect of time and trial on both leptin (p=0.045) and active ghrelin (p=0.046).
CONCLUSION: Post-exercise water immersion is associated with higher energy intake in the subsequent meal compared to CON. This is an important consideration for trained men using water immersion as a method of recovery from exercise.
Med Sci Sports Exerc. 2010 Aug 23. Post-Exercise Water Immersion Increases Short Term Food Intake in Trained Men.
METHODS: Ten physically active males participated in three randomised, counterbalanced trials consisting of 40 min of treadmill running (70% V O2peak), followed by 20 min of either cold water immersion (CWI: 15 degrees C); neutral water immersion (NWI: 33 degrees C) or a resting control with no immersion (CON). Participants were then given 30 min access to a buffet-type breakfast of precisely known quantity and nutrient composition from which they could consume ad libitum.
RESULTS: Participants consumed significantly more energy following both CWI (4893+/-1554 kJ, p=0.006) and NWI (5167+/-1975 kJ, p=0.010) compared to CON (4089+/-1585 kJ). However, there was no significant difference in total energy intake between the CWI and NWI trials (p=0.595). These changes were associated with a significant interaction effect of time and trial on both leptin (p=0.045) and active ghrelin (p=0.046).
CONCLUSION: Post-exercise water immersion is associated with higher energy intake in the subsequent meal compared to CON. This is an important consideration for trained men using water immersion as a method of recovery from exercise.
Med Sci Sports Exerc. 2010 Aug 23. Post-Exercise Water Immersion Increases Short Term Food Intake in Trained Men.