Suggest 1 ~ 3 times, 2 times is the best, and the middle should be separated, because the muscles we exercise need to be repaired. It may hurt for a few days after the first practice. This is a normal lactic acid accumulation. It doesn't matter. Stretch. It is suggested that training in other parts should be interspersed between the two lower body trainings, such as girls' back, chest, arms, shoulders and abdomen. Everyone should practice, and the whole body should practice, which will be more coordinated.