Resumen de Effects of High-Intensity Intermittent Exercise Training on Appetite Regulation.
Aaron Y. Sim, Karen E. Wallman, Timothy J. Fairchild, Kym J. Guelfi
AB Objective: An acute bout of high-intensity intermittent exercise suppresses ad libitum energy intake at the postexercise meal. The present study examined the effects of 12 wk of high-intensity intermittent exercise training (HIIT) compared with moderate-intensity continuous exercise training (MICT) on appetite regulation. Methods: Thirty overweight inactive men (body mass index, 27.2 +/- 1.3 kg[middle dot]m-2; V[spacing dot above]O2peak, 35.3 +/- 5.3 mL[middle dot]kg-1[middle dot]min-1) were randomized to either HIIT or MICT (involving 12 wk of training, three sessions per week) or a control group (CON) (n = 10 per group). Ad libitum energy intake from a laboratory test meal was assessed after both a low-energy (847 kJ) and a high-energy preload (2438 kJ) before and after the intervention. Perceived appetite and appetite-related blood variables were also measured. Results: There was no significant effect of the intervention period on energy intake at the test meal after the two different preloads (P >= 0.05). However, the 95% confidence interval indicated a clinically meaningful decrease in energy intake after the high-energy preload compared with the low-energy preload in response to HIIT (516 +/- 395 kJ decrease), but not for MICT or CON, suggesting improved appetite regulation. This was not associated with alterations in the perception of appetite or the circulating concentration of a number of appetite-related peptides or metabolites, although insulin sensitivity was enhanced with HIIT only (P = 0.003). Conclusions: HIIT seems to benefit appetite regulation in overweight men. The mechanisms for this remain to be elucidated
