Reverse support arm training
Facing your back to the chair, place your hands on both edges of the chair.
Keep your upper body straight and your knees slightly bent (greater than 90°).
Sit down with your buttocks down and bend your elbow joints at the same time. When your upper arms are basically parallel to the chair surface, maintain the posture for 3 to 5 seconds.
Then, straighten your arms and return your body to its original position. Do 2 to 3 groups each time, 10 to 15 times in each group.
