The purpose of this study was to investigate the relationship between CPK activity and training quantity, and to examine differences of CPK activity among kinds of sports. Subjects were 123 male athletes of 10 kinds of athletics and 7 as control group. The results were as follows; In order of CPK activity, they were weight lifter, wrestler, basketball player, long distance runner, gymnast, judo wrestler, sprinter, succor player, archery player, and badminton player. CPK activity values of all athletic groups were significantly higher than that of control group. Besides, CPK activity values of all athletic groups except badminton player exceeded the ordinary level. The more training quantity was, the higher CPK activity value became. The peak CPK value appeared soon after the exercise or within a few minutes.

DESCENTE SPORTS SCIENCE Vol.1/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE