The purpose of this study is to make clear the characteristic response of the golf club shaft in swing. Six person (male and female each three), who are experienced player of Nihon University Golf Member, were chosen for the experiment. Two pieces of dynamic strain grudge were put on the surface of the club (#1) shaft. One was in horizontal and the other was in vertical direction on the same place. The dynamic strain values those of club shaft swing through a initial movement to follow through were recorded and analyzed. The main findings in the present study are summarized as follows;
　Horizontal pattern waves of the club shaft during swing just before impact to impact were classified three patterns. As each K.Y, K.I, S.A subject a highly sharp peak was recognized on the wave. W. D, N. K subjects showed loosy peak on the wave. In the case of subject K. A, two phase were recognized on the wave. As concerning vertical pattern waves, the results as follows; As each N.K, K.Y, K.I, K.A subjects, a highly sharp peak was recognized on the wave. W.D subject showed loosy peak on the wave. In the case of subject S.A, two phase were recognized on the wave.

DESCENTE SPORTS SCIENCE Vol.8/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE