Exercise two muscle groups at a time, a big muscle group and a small muscle group. I suggest that chest and triceps brachii be practiced together, because most chest exercises are pushing movements, and all pushing movements will use triceps brachii. After chest exercise, practicing triceps brachii will kill two birds with one stone, and the stimulation effect is good. Practice back and biceps brachii one day. When practicing back, most of them are pulling movements, and pulling movements will use biceps brachii. It is more scientific to practice thighs, shoulders and abdomen one day. Don't neglect thigh exercise, or your body will be out of balance.