Yes, generally, women's menstruation takes 28 days as a cycle, and the menstrual cycle is divided into four stages: menstrual period (menstrual period 1-6 days), late menstrual period (menstrual period 7- 13 days), inter-menstrual period (menstrual period 14-20 days) and pre-menstrual period (menstrual period 2/kloc-) Leptin concentration changes with the change of menstrual cycle, with the lowest in menstrual period and rising gradually in the later period. Leptin began to rise on the 7th day of menstruation, and reached the highest level during ovulation (about 65438+ 4th day of menstruation), and gradually decreased in the prophase until the lowest level during menstruation. Therefore, the best time to lose weight during menstrual cycle is from the 7th day to the 20th day. During this period, the exercise frequency should be kept at 2 hours every day or every other day, and at least 7 hours every week. Running, swimming, cycling and other sports are recommended.