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Rehabilitation Practice and Science

Translated Title

肥胖者減重前後之攝氧效率斜率變化

Abstract

Background and Purpose: Oxygen uptake efficiency slope (OUES) is an index for evaluating cardiorespiratory fitness without performing maximal exercise and correlates well with the individual's peak oxygen uptake (□O(superscript 2peak)). The purpose of this study was to determine the clinical usefulness of OUES for determining the cardiorespiratory fitness of obese adults without cardiovascular diseases by investigating (1) the correlation between OUES and weight (2) the change in the OUES after a weight-reduction program. Methods: Fifty-eight obese subjects (13men and 45women) were enrolled in a 12-week weight-reduction program, including diet, exercise and psychological programs. They underwent maximal cycle ergometer exercise testing, with breath-by-breath gas analysis performed before and after the program. Pearson correlation coefficients were calculated to determine the correlation between OUES and other physiological variables, including weight, body mass index, (□O(superscript 2peak)), (□O(superscript 2peak))/weight and minute ventilation/carbon dioxide production slope. Paired t tests were used for comparing these variables before and after the weight-reduction program. Results: The OUES values were positively correlated with the weights (r=0.60, p＜0.001) of the individuals. By the end of the weight-reduction program, the weights of 34 subjects had reduced by ＞5% and of another 24 subjects by ＜5%. Both groups showed a statistically significant increase in the (□O(superscript 2peak))/weight value at the end of the program. By the end of the program, the OUES had not changed for individuals whose weight had reduced by ＜5% (p=0.12) but showed a statistically significant decrease (p=0.011) from 2119 to 1970 for those whose weight had reduced by ＞5%. Conclusions: While using the OUES for assessing cardiorespiratory fitness, the influence of weight on the OUES value should also be considered.

Language

Traditional Chinese

First Page

219

Last Page

225

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