Tricep Leg Lift
Start position: Get into push-up position. Bend your elbows and lower your body until your chest is just a few inches off the ground.
Movement: Keeping your legs straight, raise one leg until you get a good contraction in the glutes. Lower the elevated leg and repeat with the other leg. Return to start position. Alternate legs with each rep.
Perform: 10 repetitions
This exercise can be made easier by elevating the hands and harder by elevating the legs.