5 MIN PLANK CHALLENGE (NO EQUIPMENT BODYWEIGHT WORKOUT!) - YouTube
5 Minute Plank Challenge - DragonsWarriors.com
Dr. Subhasree Ray on Twitter: "5-minute plank. In addition to the core, this exercise helps in strengthening the muscles in your back, chest, arms, thighs, and shoulders. Implement in phases. https://t.co/qURugpGAvT" /