For better understanding of working capacity, it may be useful to know the relationship between the sizes of the tissue of the body (as a mass) and their function. The measurement of the subcutaneous fat by means of the skinfold caliper or x-ray photograph is often made for estimation of the body composition. However, by this method, it is not possible to measure the cross-section of the tissue. Recently, the apparatus of ultrasonic photography was exploited, which makes it possible to observe directly the cross-section of the tissue. On the other hand, a physical method which is called the "densitometory" has been used as a method to calculate the weight or ratio of the whole body compartments. The purpose of this study is to analyse the body composition of Judoists by these methods above mentioned.
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