SETUP: Lay flat on the floor with your legs close together. Place your hands just outside shoulder-width. Drive yourself up, until you’ve reached the top of a Push Up, and your body is perfectly straight. The only points of contact with the floor should be a) your hands, and b) your toes.
REP: Hold this position Don’t let your shape change.
TIP: Keep breathing, but focus on squeezing your abs every time you breathe out.