Degree Name

Master of Science (MS)

Semester of Degree Completion

1988

Thesis Director

M. Thomas Woodall

Abstract

This study was designed to determine the steady state oxygen cost of arm crank ergometry with the Monark Rehab Trainer, a device used for exercise training in many cardiac rehabilitation programs. Fifteen male (25.2 yrs. ± 4.1) and fifteen female (23.8 yrs. ± 4.0) subjects were tested in the seated position with the mid-point of the crank wheel adjusted to shoulder height. No attempt was made to stabilize the shoulder girdle, as this is typically not done when training with this device. The test protocol for both groups consisted of progressive three minute work stages followed by a thirty second rest period. Cranking rate was set at 60 rpm. Presented below are the mean oxygen uptakes (VO2/ml min.) per workload for the two groups.

Oxygen uptakes from the non-maximal workloads were used to develop prediction equations for the steady state oxygen cost (VO2 ml/min.) of arm crank ergometry with this device. For males: VO2 ml/min. = 2.9 (kpm) + 563.3 (r = .98; SEE = 96.3). For females: VO2 ml/min. = 3.3 (kpm) + 436.3 (r = 95; SEE = 88.3). These data suggest that when training on the Monark Rehab Trainer without shoulder stabilization, the oxygen cost of workloads between 150-600 kpm/minute is greater for males (mean = 312.3 ± 30.9 ml/min), and females (mean = 314 .8 ± 19.5 ml/min.), than that predicted by Franklin and Vander for males and females on the Schwinn Model EX2 cycle ergometer respectively. Thus, the present equations may result in more appropriate workloads for patients using this type of training device.

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