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A PROTOCOL FOR COMPARING DIFFERENT ISOCALORIC MODES OF EXERCISE AT THE SAME RELATIVE INTENSITY

Abstract

M. Sato1, B. Weaver2, T. Krieger1, C. A. Johnson2, D.E. Lankford FACSM1

1California State Polytechnic–Humboldt, Arcata, CA; 2Brigham Young University–Idaho, Rexburg, ID

Research on isocaloric exercise utilizing different modes of exercise is relatively novel. PURPOSE: The purpose of the study was to create a research model where different modes of exercise could be examined under isocaloric conditions. METHODS: 22 participants (age 24.3 ± 4.1 yrs) participated in the study. All participants completed a level incline jogging (LIJ) protocol (0% grade) followed by a high incline walking (HIW) protocol at 20% grade. Prior to each protocol the Lankford equation was utilized to determine isocaloric intensities at an RPE = 10, following which the participants made slight alterations to the speed until oxygen uptake aligned between HIW and LIJ. The HIW protocol and LIJ protocols each lasted 20 minutes in duration. Mean oxygen uptake between HIW and LIJ were compared to determine whether protocols resulted in isocaloric activity over the 20 minutes. RESULTS: A paired-samples t-test (matched by participant) indicated no significant difference between the mean for HIW and LIJ (HIW 24.108 ± 3.632, LIJ 24.250 ± 3.530; p=0.580). A regression of the mean HIW on the mean LIJ demonstrated a significant linear relationship (R=0.945; p < 0.001). Bland-Altman results were consistent with no significant discrepancy in the mean oxygen uptake of the HIW and LIJ protocols. CONCLUSION: The LIJ and HIW protocols resulted in isocaloric energy requirements.

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