Do not stretch for a month. If you have started exercising, 2-3 times a week, and don't get into the habit of stretching after exercise, you won't feel much, but your muscles have begun to tighten. No stretching for three months. If you continue to exercise for 3 months without stretching after exercise, the muscle elasticity will begin to decline, and the muscles may be more nervous and feel less obvious during exercise. However, on the second day after exercise, some parts of your body may be tired, or the knee joint may feel fuzzy discomfort, which is a manifestation of early strain.

If you don't stretch for six months, your muscle length may have been significantly shortened, muscle elasticity will be further reduced, and muscle tension will continue to increase. At this time, joint pain will appear in large-scale fitness, and the pain and fatigue the next day will be more obvious than before.

Professional stretching is actually a kind of exercise to lengthen muscles and ligaments. It can be divided into pre-exercise stretching and post-exercise stretching. Stretching before exercise can reduce muscle viscosity and internal energy consumption during exercise. At the same time, increasing elasticity can improve muscle contraction speed and muscle contraction intensity. Stretching after exercise can further relax muscles, accelerate blood circulation and lymphatic circulation of the body, promote the elimination of metabolites, slow down delayed muscle soreness in the short term after exercise, and promote excessive recovery of the body.