Doing appropriate exercise during the menstrual period is beneficial, such as riding a bike and walking... It can relieve the bad mood during the menstrual period. Just don't do strenuous exercise.
The best exercise during the menstrual period should be adjustment exercises. For example, on the 1st and 2nd day of menstruation, you can do some light activities such as radio calisthenics, aerobics, Tai Chi, and qigong. On the 3rd and 4th day, the amount of exercise can be increased, such as playing volleyball lightly, badminton, or table tennis.