Fitness belongs to anaerobic exercise, and running belongs to aerobic exercise. These two kinds of exercises should be carried out in one day. Whether it is to gain muscle or lose fat, the exercise sequence is anaerobic first, then aerobic. Only in this way can the exercise effect reach the best level. If you exercise separately, it will not only be bad for anaerobic and aerobic exercise, but also waste time and get twice the result with half the effort.