Losing weight after menstruation is the best time, especially after the menstrual blood clears. This is because women tend to retain water and sodium during menstruation due to changes in hormone levels in the body, which causes weight gain. After menstruation, the body can excrete sodium through sweating and urination, and the body weight returns to normal. As the estrogen level in the body gradually recovers and rises, the body’s gastrointestinal tract peristalsis is accelerated, and exercise at this time can promote the basal metabolic rate and better absorption and excretion of nutrients. After the end of the menstruation can be controlled diet and exercise to achieve weight loss, after the end of the menstruation can not immediately carry out strenuous exercise, the amount of exercise to gradually increase, so as not to affect the body, can not rely solely on the control of diet method of exercise, easy to cause physical weakness, not suitable for weight loss.