Brief intensity exercise and resistive force selection in obese/overweight subjects: body mass or composition

Julien S. Baker, Bruce Davies

Research output: Contribution to journalConference article

Abstract

PURPOSE
The purpose of this study was to compare the maximal exercise performance of overweight and obese subjects during friction braked cycle ergometry of 10 s duration when resistive forces reflected total-body mass (TBM) or fat-free mass (FFM).

METHODSData collection was administered using a single blind, cross – over design. Subjects were assigned in random to either the TBM or FFM protocol. 11 healthy, overweight, male university students (age 22.3 ± 2 yrs, body fat 27.1 ± 2 %) participated in the study. Body composition was assessed using underwater weighing procedures. Fat mass was ascertained from body density values. Power outputs were calculated using high intensity cycle ergometry.

RESULTSDifferences (P ≥ 0.01) in peak power output (PPO) were found between TBM and FFM (1029 ± 98 W TBM vs. 1397± 146WFFM). Significant decreases (P < 0.05) were observed for the time taken to reach PPO (4 ± 1.4sTBMvs2± 1 s FFM). Pedal velocity significantly increased (P ≥ 0.01) during the FFM protocol (98.2 ± 9.7 rpm TBM vs. 139.6 ± 6.6 rpm FFM) and resistive forces significantly decreased (7.5 ± 0.4 kg TBM vs. 5.5 ± 0.4 kg FFM).

CONCLUSIONSThe findings of this study suggest that greater peak power outputs are obtainable when resistive forces reflect FFM as opposed to TBM. The results have implications that relate to both the pathology of disease, related clinical examinations and exercise prescription in overweight populations.

© 2006 American College of Sports Medicine
Original languageEnglish
Pages (from-to)S315-S315
Number of pages1
JournalMedicine & Science in Sports & Exercise
Volume38
Issue number5
Publication statusPublished - 1 May 2006
Externally publishedYes

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