【Supine Hip Raise】Training parts: buttocks and waist muscles. Preparatory position: Lie on your back on the ground with your knees bent, arms flat at your sides, and palms close to the ground. Action: Lift the buttocks, that is, the pelvic area, until the buttocks and waist are straightened. The buttocks and waist muscles should feel tight. Hold it for 10 seconds and then slowly lower it. Repeat 12 to 15 times.