Opposite muscle groups or opposite muscle groups can be practiced together, which is not only harmless but also has a better stimulating effect on muscles. For example, pectoralis major and triceps brachii can be relatively together, and pectoralis major and dorsal muscles are relatively or together. Back and waist can be practiced together. Biceps and triceps can be practiced together. It is best to practice your thighs alone for a day. Arms and forearms can be practiced together. Shoulders can be used for any upper body exercise. It is also feasible for large muscle groups to drive small muscle groups, but it should be noted that large muscle groups should be trained first, and then small muscle groups should be trained.

Need to be reminded that to exercise two muscle groups at the same time, the exercise time should be well grasped, preferably about one hour, and the exercise effect will become worse after more than one and a half hours. Therefore, the rest time between groups should be controlled at about 1 minute. If you feel good after exercise, you can rest for half a minute.