Abstract
In the present study, delayed menarche in female athletes was individually verified by the interval between age at menarche and the age at the maximum peak velocity (MPV) of height derived from the wavelet interpolation method (WIM), however, an evaluation system for delayed menarche could not be established. It is necessary to distinguish between female athletes in whom delayed menarche occurs or not in every athletes in order to elucidate the effect of regular training for delayed menarche. For that reason, the evaluation system for delayed menarche is derived from regression analysis between age at menarche and age at MPV of height. Health examination records of 144 female athletes in their first year at a university who participated in the national level competition were reviewed from the first grade of elementary school until the third year of high school (from 1986 to 1998). The longitudinal data of height were obtained from the health examination records. The age at menarche and the history of athletic sports training in these data were researched by questionnaires and interview. Non-athletes were researched as control group similar to the athletes, and 209 were randomly selected in order to construct the criterion of evaluation in delayed menarche. Least square approximation polynomials of age at menarche for age at MPV of height from the first to the fourth order were constructed for the evaluation in delayed menarche, and the regression equation of the first order was valid. So the linear regression evaluation of age at menarche for age at MPV of height was applied for each athletes. The score judged by the regression evaluation was derived in each athlete, and a positive score was shown in each athletic sport except table tennis and tennis. Athletic sports showing strongly positive scores were soft tennis, volleyball, softball and track and field.
