Floor Wipers

Lie down on the floor and have a buddy hand you a weighted bar over your chest for you to reach up and grab it with hands shoulder-width apart. Hold it at the top as if you were holding the bar at the top of the bench press. While holding it there, bring your legs all the way up to one side (to the edge of the bar or the plate). Slowly bring it back down to the center without letting your legs touch the ground. Repeat this but ring your legs to the other side as well.