一般女性月經初期時間約30天來潮一次，多數研顯著，體重、體脂肪影響女性月經來潮時間。國內柔道選手為了參與競賽，於賽前皆有減重行為，本文旨在探討急減重的行為對女子柔道選手生理週期的影響。以文獻探討的方式，將國內外有關女性運動員生理週期相關研究加以彙集，並依減重行為，、運動訓練強度及訓練持續時間等相關因素，加以深入探討。獲知下結論：一、女性柔道運動為了參與競賽，所實施的減重行為，並不致於影響或延後初經來潮年齡。二、女性柔道運動員接受高負荷體能訓練，並不會產生高比率生理週期異常現象。三、短期減重行為，只改變了的質中之體液(組織液)，非體脂肪。所以，減重行為並不是造成女性柔道運動員生理週期異常的主因。

Women’s menstrual period is around 30 days since their menophania. According to the analysis, weight and body fat affect the menstrual period. It is common that judo players lose weight prior to the contests. What we are going to discuss in this study is whether quick weight loss like this will affect the menstrual period of women judo players. The method of this article is document analysis. To begin with, the theses on women athletes’ menstrual period of both local and foreign scholars were collected. Then, based on these research documents, the effect of weight loss on women judo players is analyzed and commented with the following main conclusion: 1.Women judo players have to lose weight rapidly in order to meet the competition level, will not cause the delay of the coming of menophania of the athletes. 2.the strenuous physical training will nto lead to high percentage of irregularity of menstruation on women judo players. 3.The short-term weight loss on women judo players is the loss of body fluid (tissue fluid), instead of body fat. Therefore, it should not be the reason for the irregular menstruation of women judo athletes.