I think it is arranged in the afternoon, because afternoon is the best time for human hormones, strength and various reactions. For us ordinary people, the difference in the influence of time on physical strength can be ignored and does not need special consideration. Choose the timing of exercise according to your own time and diet. Avoid strenuous exercise when you fall asleep. Excessive sweating, limb excitement before going to bed, and high body temperature will reduce the quality of sleep. Before going to bed, you can relax your muscles through massage and yoga, and do some stretching and relaxation exercises to promote sleep.