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COMPARISON OF THREE RESISTANCE TRAINING PROTOCOLS ON MAGNITUDE AND DURATION OF EXCESS POST-EXERCISE OXYGEN CONSUMPTION

Abstract

COMPARISON OF THREE RESISTANCE TRAINING PROTOCOLS ON MAGNITUDE AND DURATION OF EXCESS POST-EXERCISE OXYGEN CONSUMPTION

T. Bennion, D.E. Lankford, M. Yee, M. Phillips, C. Morris, T. Johnson, J. Lyle

Brigham Young University – Idaho, Rexburg, Idaho

It is well recognized that excess post-exercise oxygen consumption (EPOC) occurs following physical activity. Current trends identify EPOC as potential post-exercise caloric expenditure. However, limited information is available regarding EPOC following resistance training. Purpose: This study compared EPOC following resistance-training protocols by the NSCA for strength (STR), local muscular endurance (LME), and the ACSM’s resistance training guideline for weight loss (ACSM). Methods: 18 well-trained male participants (24 ± 1.2 years, 78.56 ± 4.27 kg) volunteered to assess their 1-repetition maximum (1-RM) in the power clean, bench press, and back squat, and were randomly assigned to STR (n=6), LME (n=6), or ACSM (n=6) groups. Each group then performed a single set to exhaustion of power cleans, bench press, and back squats, but with different load intensities and rest periods between exercises: STR = 85% 1-RM with 2 – 5 minute rests, LME = 65% 1-RM with ≤ 1 minute rests, and ACSM = 75% of 1-RM with 1 – 2 minute rests. Resting VO2 (ml•kg•min-1) was determined prior to resistance training testing. VO2 above resting was determined at 3-minutes, 30-minutes, 60-minutes, 6-hours, 12-hours, 24-hours, and 36-hours post exercise. A 3x8 mixed model ANOVA was used to determine differences between groups over time. Results: There were no significant differences in VO2 between groups at any time point (p=0.96), indicating that a single set performed to exhaustion of STR, LME, and ACSM resistance training each lend to a similar EPOC magnitude and duration despite different intensities. Conclusion: Single set resistance training following NSCA guidelines for STR and LME, and the ACSM guidelines for weight loss result in similar EPOC despite differing intensities, and therefore one is not more advantageous than the other in EPOC for post exercise caloric expenditure.

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