1 supine hip lifting combination exercise, when supine hip lifting action, pay attention to the legs half flexion, upper body supine, hip lifting, hands supporting hips, forming a diagonal line on the upper body. 2 In-situ supine combination exercise, when lifting your arms on your back, pay attention to the body lying flat on the mat to form a straight line, hold dumbbells with both hands, and approach your chest from both sides.