Les effets de la modalité d'entraînement sur la compensation énergétique post-entraînement chez l'adulte

Abstract

Background: Previous research reported no effect of exercise modality on energy intake (EI). However, the relatively low energy cost of resistance training, the absence of total energyexpenditure (TEE) measurements and the acute nature of the studies may be limiting factors. To our knowledge, it is unknown whether isocaloric resistance and aerobic-based exercises may lead to different degrees of post-exercise energy compensation (PEEC) over 34 hours. Objective: We evaluated the effects of exercise modality (resistance and aerobic) on EI, TEE and PEEC acutely, after 10 hours and 34 hours. Method: Sixteen moderately active men and women participated in three randomized crossover sessions: a resistanceand an aerobic-based exercise session performed at 70% of 1 RM and of VO2max, respectively, as well as a sedentary control session. Exercise energy expenditure (EEE) was continuously measured (indirect calorimetry) throughout the training sessions, which were designed to produce an isocaloric EEE of 4 kcal/kg body weight. TEE and EI were monitored for 34 hours post-exercise with 1 biaxial accelerometer and a validated food menu, respectively. Results: There were no differences in EI across exercise modalities acutely, 10 and 34 hours later. However, a modality-sex interaction was noted for the acute energy intake. Men ate more after the resistance than after the aerobic session (1567 ± 469; 1255 ± 409 kcal, respectively; p = 0.034), while no difference were seen for the women (568 ± 237; 648 ± 270 kcal, respectively; p = NS). Acute relative energy intake was lower after the aerobic session and resistance session compared to the control (673 ± 425; 793 ± 588; 1032 ± 689 kcal, respectively; p< 0.01). No difference in TEE and PEEC were found following 10 hours and 34 hours following the exercise intervention. Conclusion: Exercise modality does not impact PEEC when EEE is the same. However, the results suggest that exercise modality affects EI acutely between sexes, where men ate more after the resistance than after the aerobic exercise session.