High-intensity interval training (HIIT) elicits health benefits but it is unclear how HIIT impacts sedentary behaviour. In this preliminary study, we compared the effects of supervised HIIT or moderate-intensity continuous training (MICT) on sedentary time in overweight/obese adults. In both groups, percentage of time spent in sedentary activities was significantly reduced during the supervised exercise intervention (time main effect, P = 0.03), suggesting that both HIIT and MICT replaced time spent previously being sedentary.
Keywords: HIIT; accelerometer; accéléromètre; comportement sédentaire; entraînement par intervalle d’intensité élevée; exercice physique; exercise; high-intensity interval training; sedentary behaviour.