Next on, we have double clam with Namaste. What we need to understand is what is clam. So let's lie down. Get your feet together, this is what a clam is. Now let's start the exercise. Get into a clam position, hands in a Namaste overhead. Now, crunch pressing your lower back into the floor, back should not arch. Shoulders come off the mat, simultaneously the clam is pulled into the chest. Contract and slowly release to go back to the starting position. Repeat this move for 30 seconds. It's important to remember that the hands and legs should not go fully down. This could lead to a lower back injury..