Table 1.

Trunk exercises for the experimental group.

	Progression	Unstable Surface
		Buttocks	Feet
Hook-lying
1. Abdominal draw-in maneuver	None
2. Abdominal muscles isometric contraction	1st
3. Lower trunk rotation	2nd
4. Bridging with abdominal draw-in maneuver	3rd
Sitting Level 1—sitting without foot support
1. Pelvic anterior and posterior tilt
2. Pelvic lateral tilt	1st
3. Trunk flexion, extension, rotation
4. Affected arm lateral reach with Swiss ball under the arm	2nd
5. Pelvic rotation
Sitting Level 2—sitting on Swiss ball with feet on the ground
1. Quiet sitting with chest expansion exercise
2. Pelvic anterior and posterior tilt
3. Pelvic lateral tilt	None
4. Stepping
5. Stepping with arm swing
Note.
	Balance pad
	BOSU ball
	Swiss ball