Table 2.

Details of the operation of stretching training exercise (STE).

Sequence of actions	Action details
Action 1	The subjects are seated on the ground with both upper limbs supporting the ground for balance, and both lower limbs are placed horizontally in front of the ground. Then, the knee joint of one lower limb slowly centripetal flexed to 90°, held for 1–2 s, and then returned to the initial position. Contralateral leg stretching is the same.
Action 2	Subjects are in prone position with both elbows supporting their entire body weight. Both lower limbs are extended backward to the extreme position. Then one lower limb is supported and the opposite lower limb is extended backward and upward.
Action 3	Subjects performed the sit-stand alternating task with the help of a chair.
Action 4	Subjects performed alternating one-legged stair support tasks
Action 5	Subject's back is pressed against the wall to maintain static squat task, knee flexion is about 120°