You also shouldn’t waste your time doing a million crunches every day. While crunches can be useful occasionally and do have a time and a place, they aren’t the best or the most efficient exercises to help you strengthen and tone your core.
Rotate open toward the right and kick your left leg under and through toward where your right hand is. As you bring your left leg forward and through, lift your right hand. You want to rotate all the way through with your left leg out straight so that you are almost sitting with your left hand down to support you. You want to “sit through.”Then bring the left leg back through so you are back in the starting position. Next rotate to the left and kick your right leg through and forward as you lift your left hand. Move as quickly as you can back and forth.