the plank is an excellent core strengthener.
- lay face down on the floor.
- place hands under shoulders as if preparing for push-ups.
- come up on toes then put weight on your knees and bring your torso up with your head in line with your back.
- slowly come up with your knees to form a straight line from your feet to your head like a plank with arms straight.
another version of this is to only come up on your bent elbows with your forearms resting on the ground and hands in a loose fist. either way keep your core strong and hold several seconds then rest. and begin again 🙂
*image from eastbaytrainer.com