Yoga is called camel style, with legs kneeling back and forth and one hand holding the opposite ankle. Kneeling posture, knees open to hip breadth, soles up; Hands are naturally placed above the pelvis and the back is straight; Starting from the upper back, slowly bend back, tighten the muscles of thighs, buttocks and abdomen, and face the ceiling; When bending back, put your hands on your heels; Inhale, put your hands behind your body, hold your chest up for 30 seconds, breathe naturally, and slowly return to your original position.