The Effects Of An Acute Bout Of Resistance Training On College-aged Male 24hr Rmr

Abstract

It has been demonstrated that increasing caloric expenditure through exercise participation is one mechanism by which to modify caloric balance in favor of weight loss. While chronic resistance training (RT) has been demonstrated to elevate resting metabolic rate (RMR) due to increased lean mass, there has been less research on the acute effects of a single bout of resistance training on RMR. PURPOSE: To determine the effects of an acute bout of resistance training on the 24 h RMR of college-aged males. METHODS: Ten healthy men aged 18-24yr performed 8 exercises (2 sets, 10 repetitions, 2 min recovery, 70% 1RM & 8RM) following ACSM Guidelines for RT. Subjects reported for testing following a 12 h fast and engaged in 7, 30 min RMR measurements over the next 24 h. Subjects completed both an experimental (RT) and control (no exercise) day separated by 1 week. RESULTS: RMR (kcal) data was analyzed using a 1 way ANOVA with repeated measures on 2 factors (group and time). Statistical analysis revealed that there was no significant main effect for group (2179.58± 44.82 kcal vs. 2143.16 ± 44.82 kcal; F = .330, p = .567) or group x time interaction (F =.592, p =.736, Table 1). There was a significant main effect for time (F = 5.126, p < .001, Table 2). CONCLUSION: We conclude that an acute bout of RT, following ACSM guidelines, did not significantly impact RMR in RT males 24 hrs post-exercise.Table 1: Mean 24-hour RMR Values by GroupTable 2: Mean RMR Values across Measurements