How to do Dhanurasana, a variation? 

• Lie down flat on your abdomen. 
• Ensure that your forehead is placed against the floor and your legs are close together.
• Bend your legs at the knees and bring your feet up behind you.
• Stretch your arms backward and grasp your ankles.
• Inhale. Lift your head off the ground and simultaneously lift your thighs upwards. 
• Your body should be arching upwards now.
• Rock your body back and forth while maintaining the position. 
• Inhale as you rock backward and exhale as you rock forwards.