Begin sitting on your butt with your legs straight. Bring your palms a few inches behind you, fingertips facing the toes.
Press into your feet and lift your bum off the ground. Try to keep your body in one diagonal line. You can also do this exercise on your elbows if it bothers your wrists.
Alternate between lifting your right leg up and then your left to complete the rep. Move with control, making the movements slow and steady and keeping the hips lifted.