Krishnamacharya shows us how it’s done
This posture helps to build both strength and focus. It requires and develops balanced upper body strength, especially in the arms and wrists.
Remember to keep your elbow tight into the body, use your hands and the full power of your legs.
Focus on hugging the leg muscles into the bones and press back through the heels while pressing the floor away with your hands to keep your body parallel to the floor.
This will build stability and strength in the legs, arms and core of the body.
Be sure to protect your lower back by tucking the tailbone and engaging the core.
Until you build enough strength to hold the full variation of the pose you can modify and keep your knees on the floor.
Nelumbo Yoga 