Hormones affect more than just mood swings during that “time of the month”. They also affect muscles, joints and training. Studies show that you can gain more muscle and strength certain times during your menstrual cycle. So let's use it to our benefit :) There are 4 phases to your cycle. To make things easier to understand let's start after your period ends: Follicular Phase - (Post Period) Lasts 7-10 days, progesterone is normal, increasing estrogen, testosterone is high, a