Semi-lotus matsyendrasana
Exercise:
1. Sit up straight, keep your legs straight forward, bend your left leg on your right thigh, and put the soles of your feet up.
2. Exhale, stretch your left arm forward, grab your right toe with your left hand, turn your upper body to the right, put your right arm back, and hold the left side of your waist with your right hand.
3. Inhale, then exhale, while turning your head and upper body to the right as much as possible, and keep breathing naturally for 20 seconds.