Dr. Wayne W. Campbell


Foods and Nutrition


Nutrition, Fitness, and Health


Appetite, Energy Intake, Exercise, Hunger, Strength Exercise


Background: Aerobic exercise (AEx) has been shown to induce a transient anorexia of exercise. The impact of AEx on hunger and energy intake is controversial. The effects of resistance exercise (REx) on appetite and energy intake are undocumented.

Methods: Nineteen young, fit adults (9M, 10F; age 22±1 y; VO2max 55.9±3.0 ml•kg-1•min-1) completed duplicate sessions of: AEx (35 min of cycling at 70% heart rate reserve); REx (35 min, 3 sets at 70% one rep max for five exercises); and no exercise (CON). Perceived hunger was assessed throughout each session. 30 min post-Ex a pasta meal was consumed ad libitum. Total (TEI) and relative (REI) energy intakes were determined [REI = TEI - energy expenditure of exercise (EEEx)].

Results: Hunger was reduced immediately after AEx and returned to CON levels 30 min later, whereas the hunger response after REx was not different than CON (session effect p<0.05). TEI of the pasta meal was higher after AEx and REx than control (897±96, 928±94, 784±89 kcal, respectively; session effect p<0.05). The estimated EEEx of AEx and REx differed (290±7 vs. 80±2 kcal, p<0.05). REI was lower after AEx than REx and CON (607±94, 848±94, 784±89 kcal, p<0.05).

Conclusion: The description that AEx induces anorexia of exercise is not consistent with the increased TEI, but reflects the transient decrease in hunger and lower REI attributable to the EEEx. REx stimulates energy intake and does not induce anorexia of exercise