3) Body plank with arm backward: Hard
Get into the forearm position. Your elbows are directly below your shoulders. Your forearms and hands are parallel and shoulder-width apart on the floor.
Build body tension and pull your belly button inward.
Shift your weight onto your right forearm. Push your body as far as possible without lifting your hips.
At the same time, your left arm is towards your left knee. Stay straight from your head to your heels.
Then push forward by rolling over your toes. In the
Forward movement, place your left arm back into forearm support.
Repeat the on the other side.
