Anyone interested in Judo would also take an interest regarding the degree of intensity of exercise involved in Judo. By "intensity of exercise" is meant the magnitude of the load on the body. The present study was undertaken in order to elucidate the problem of the intensity of exercise involved in Judo. One of the methods of investigating this problem is the measurement of energy exchange. Sugimoto and associates compared the intensity of exercise involved in various Judo techniques by measuring the energy exchange rate during performance of various techniques. However, there are certain difficulties involved in this method of investigation. For instance, it is not suitable for measurements during a protracted performance, and also, the mask and the tube hinder free movement, and the performance cannot be termed " free exercise". Thereupon, in the present investigation, a study of the heart rate of Judoists performing freely was made by telemetry (wireless recording), and the intensity of the load which the techniques impose on the body was studied along this parameter. The telemetric method has already been used by Oka and associates in studying the ECG and respiration curves during swimming and running. Takagi, Matsui, and Nomura made early investigations into the technical aspects of telemetry and contributed much to its development. Recently, telemetric studies on the heart rate were made by Yokobori (hockey), Shirai (cycling), Matsui (track and field), and Tsukakoshi (basket ball). Ishiko made studies on the strength applied to the oar during boating by telemetry. Also, many studies on the changes in heart rate made by telemetry have been reported from abroad: A.J. Kozac's and V. Skubic's comparative studies on the intensity of exercise of various sports, J. Faulkner's studies on the heart rate during physical education exercises, and E.H. Christensen's studies on the heart rate during skiing. In the present investigation, the telemetric method was applied to the study of Judofor the first time.
© Copyright 1969 Association for the Scientific Studies on Judo, Kodokan. Alle Rechte vorbehalten.