Round shoulders hunched, head moved forward, humerus moved forward due to hail, and abdomen protruded. Lumbago is due to bad posture, which is a posture problem.

Summarized some tips that you can practice at any time. Actions one, two and three can improve the hump of the hail sail, as long as there is a wall.

Action 4 ultra-thin belly, thin waist, insist on a week, pants fell off.

Action 5: Do it before going to bed to relieve back pain.

Practice is more important.