Stretching certainly helps. Stretching after fitness can prevent the calf from thickening, slow down muscle growth, improve blood circulation, relieve muscle pressure, and have better fitness effect. Not only stretching after fitness, but also stretching before fitness, so that the body can quickly enter the state of exercise and prevent muscle strain and soreness. Doing some stretching exercises after exercise can not only relax muscles, but also avoid soreness. Low-intensity stretching after exercise can stimulate muscle contraction, stretching can enhance physical fitness, enhance proprioception, (the body's adaptability to the outside world), reduce the severity of menstrual pain (dysmenorrhea), reduce muscle tension, enhance the body's ability to learn action patterns, help the damaged muscle tissue recover, and reduce the risk of joint, muscle and tendon injuries.

Common breathing mistakes: the feeling of stretching will make the trainer feel like pulling muscles, so many trainers will hold their breath when stretching. Muscles will become more tense, and stretching often gets twice the result with half the effort.