Please help me to translate this sentence,thanks!

问题描述:

Please help me to translate this sentence,thanks!
Some women are normally inactive but then all of a sudden start a problem of intense exercise.This action breaks the laws of sports science.

Some women are normally inactive but then all of a sudden start a program of intense exercise,an action that breaks the laws of sports science.一些女人通常不太活跃,但是他们会突然开始一个剧烈的锻炼项目...