Don't worry, moderate-intensity exercise and fitness during menstruation will not harm the body, but will have a positive effect on the relief of dysmenorrhea and the health of the body. An experiment studied the quantity, intensity and content of female college students' menstrual physical activity, and divided them into menstrual activity group and rest group. The final research results show that moderate-intensity menstrual exercise can obviously relieve primary dysmenorrhea and menstrual syndrome, which is beneficial to girls' physical and mental health. This may be because taking part in exercise during menstruation can promote blood circulation in the body and reduce pelvic congestion during menstruation, so that you won't have abdominal pain, abdominal pain and other bad feelings. In addition, the alternating contraction and relaxation of abdominal muscles and pelvic muscles can promote menstrual blood discharge, reduce the contraction time of uterus during menstrual period and reduce the duration of discomfort. On the other hand, due to the emotional tension during menstruation, the body will continue to be in a state of stress, the consumption of catecholamine in the body will increase, and the secretion of endorphins will increase, thus controlling the impulsive secretion of hypothalamus. The increase of prolactin will lead to ovulation disorder, luteal dysplasia or follicular pain, and the decrease of estrogen will eventually affect the endometrium and lead to irregular menstruation. If you take part in sports, you can adjust the excitement and inhibition process of the cerebral cortex, feel happy, relieve menstrual irritability, anxiety, drowsiness and other symptoms, and put an end to the vicious circle. So, what should you pay attention to during menstruation? First of all, attention should be appropriate. After all, menstruation is still in a sensitive and fragile period. Low immunity and weak constitution. It is not suitable for training with too much exercise, otherwise it is easy to get tired and injured. Second, pay less attention to the training of lower limb skeletal muscle and pelvic floor muscle. Mainly used for general training. Reducing the congestion of pelvic floor muscles and improving the blood circulation of the whole body are more conducive to his menstrual health.