Alternating Arm and Leg Raise Plank on Elbows

Setup
Lie prone on mat. Place forearms on mat, elbows under shoulders. Place legs together with forefeet on floor.
Movement Instructions
Raise body upward by straightening body in straight line between ankles, knees, hips and shoulders. Raise one leg, knee extended, until foot is above hip height, while raising the opposite arm, elbow fully extended with hand above shoulder height. Hold for 2 count, then return foot and elbow to mat. Raise other leg and opposite arm, hold, then return. Repeat.
Comments
Try to keep hips parellel to the ground and not lean shoulders or legs.