The muscle parts involved in this stretching action are: quadratus lumborum? Iliotiodal tract? Tensor fascia lata? Latissimus dorsi? Lateral femoral muscle? Vertical spinous muscle? Spine-tip multifidus muscle
Stretching method:
1. Lie on your back, legs straight, arms spread outward, and shoulder level.
2. Bend your right knee, keep your shoulders close to the ground, and slowly turn your right leg over your body to the left until the body part between your lower back and your hips feels obvious stretching.
3. The degree of leg stretching depends on the shoulder condition. During the exercise, keep the double blades close to the ground all the time and don't lift them.
4. Keep the action still 15 seconds, and then repeat the action. Change the other side, bend your left leg, and repeat the above actions in the original order.