Only when the knee joint and the surrounding muscles are strong can normal knee function be well maintained. We teach you the scientific method of knee exercise. Each action 10 times, after switching sides for a group, adhere to each group at least once a day. 1, hands double knee support the ground, the left hand and the right foot at the same time straight into a straight line (note: to place a soft pad under the knee joint to be fully protected); 2, standing, hands straight and parallel, two feet into a ding stance, one foot raised forward; 3, supine, feet as straight as possible to cross pressure to the upper body, hands lightly support the calf, head slightly raised; 4, side lying, hands support the upper body, one foot close to the ground, one foot raised as far as possible 5, hands on both knees supporting the ground, one foot raised backwards; 6, hands on both toes supporting the ground, one foot raised backwards to do stirrups; 7, hands on both knees supporting the ground, one foot raised, thighs parallel to the upper body, calves as close as possible to the thighs; 8, standing, slightly sideways, hands raised, work step. The back foot is raised while both hands are bent to the sides of the waist movement.