Muscles and ligaments should be directly involved in exercise, and muscles are divided into large muscle groups and small muscle groups. The muscles in the legs are large muscle groups. During exercise, the stress on the legs is relatively large, and the stress on the legs lasts for a long time. So this requires good cardiopulmonary function and muscle support. Practicing the upper body first will fully warm up the muscles and ligaments and prepare for the leg movements. At the same time, in the process of upper body exercise, the cardiopulmonary function has also been improved accordingly, and the coordination parts between large muscle groups have also been properly involved, thus avoiding injuries to the maximum extent.
Therefore, if there is leg exercise in the exercise schedule of the day, it can be arranged at the end of the exercise; If the lower body exercises are arranged in a week's exercise, then the leg movements can be arranged at the last stage of the week's exercise content. This is because leg exercises consume too much physical energy, and the recovery time of leg muscles is relatively long, which takes at least 2 ~ 3 days. If you exercise the lower body first, it may affect the later exercise.
In addition, when doing leg exercises just now, the intensity should not be too high, just 2 ~ 3 groups/day. With the improvement of cardiopulmonary function and muscle strength, the weight and number of groups can be gradually increased.