Today, all (even men) know what PMS is and how badly it affects the female character. But this is dangerous, rather, for others. For the women themselves, the immediate danger is the elasticity of the ligaments and mobility of the joints that increases in the premenstrual period. Thus, the elastin hormone prepares our body for birth every month.
However, if you are going to not give birth in the near future, but to train, in order to avoid fractures and strains, take the exercises in this difficult time with all responsibility. Especially it is necessary to be cautious to nulliparous girls and to those who take oral contraceptives.