Planks: 1 minute
After your last squat, lie face down on the floor and assume your pushup position in preparation for planks.
What to do: From the pushup position, lower each arm until you are supported only on the forearms, palms and toes. Straighten the back and hold the body straight and rigid, and hold, and hold, for the full minute. Planks are an excellent abdominal and core strengthening exercise.