Plank

Description

Get into a modified push-up position by balancing your body on your forearms and toes, with your body in a straight line from head to feet. Hold this position for the prescribed amount of time while drawing your abs into your spine and keeping your hips from dropping toward the floor.

Tips

To make this exercise more difficult, hold one foot up off of the floor for half the time and then switch legs for the other half of the set.