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Rehabilitation Practice and Science

Translated Title

肥胖患者與正常體重者在踏車運動時之心肺功能反應

Abstract

Obesity is a major health problem. There is considerable information regarding the association between excessive body fatness and many health risks. The purpose of this study is to compare the cardiorespiratory responses of female obese subjects and normal-weight women during cycle ergometry. The obese group included 23 female subjects with mean age of 39.6±3.2 years (range: 19-57 yrs.). The mean body weight of obese subjects was 71.4±7.0 kg. and the body mass index (BMI) was 29.0±2.0 kg/㎡. The control group included 23 normal-weight women with matched age and body height. Breath-by-breath measurement of the cardiorespiratory function was obtained during the incremental exercise of leg cycling. The anaerobic threshold (AT) was determined by ventilatory criteria. In the maximal exercise, the oxygen uptake (VO2max) of the obese group was significantly higher than respective value of the control group (1.7±0.3 1 ‧ min-1 vs 1.4±0.3 1 ‧ min-1 ).However, the VO2 max per kilogram of body weight of the obese group was lower than that of the control group (13.6±2 .1 ml ‧ kg-1‧min-1 vs 15.6±3.8 ml‧kg-1‧min-1). The higher absolute oxygen uptake for the obese subjects may partly be attributed to the increase in lean body mass (LBM). At the anaerobic threshold- the obese group also showed lower VO2, per kilogram of body weight. It is concluded that the obese group had lower oxygen uptake per unit of body weight in the maximal exercise as well as al the AT, and this result may explain why obese subjects usually experience exercise intolerence during ordinary activities.

Language

English

First Page

77

Last Page

84

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