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Rehabilitation Practice and Science

I-Wen Penn

Translated Title

長跑運動員之身體組成及體脂肪百分比：四種測量方法之比較

Abstract

Body composition characteristics are among the fundamental factors to successful sport performance. Serial assessments of body fat in athletes provide us information about training effect. Long distance running incresaes bone mineral mass, skeletal muscle weight, and plasma volume. Each of these changes may have an impact on the basic assumed constants of the classic two-compartment body composition methods. The aims of the present study was to use the newly developed four- compartment method to evaluate the validity of three two-compartment methods (hydrodensitometry, tritium dilution, and whole body 40k counting) in white male long distance runners (n=10), and to compare the body composition of these runners to sedentary controls (n=10) of similar age, weight, and body mass index. Runnershad a significantly lower percentage of fat and a higher body density. Although water, mineral and potassium constituted larger proportions of body weight in runners, the fractional contributions of these chemicals in fat free mass were similar to those in the control group. There were no significant differences between percentages of body fat derived from the four body composition methods within groups and in the pooled group. The results suggested that two-compartment methods are valid in white male long distance runners.

Language

Traditional Chinese

First Page

35

Last Page

39

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