Technique: Begin in the push up position, hands under shoulders, hollow body, feet close together. Pull the knees towards the chest, back out to full extension, and then lower into the push up. Elbows track back and up, arms at 30 degrees to the torso. Reverse back up to full extension. Advantages: A multi-muscle compound movement. Trains chest and arms, and engages the core beyond a regular pushup. A powerful total body movement that trains the upper and lower body. Faults: Hands rotated out, not aligned with shoulders, arms at 90 degrees in relation to torso, sagging head/neck, sagging hips/back extended at the bottom of the pushup; hips flexing too much at the top of the pushup position Scaling: Feet width can be adjusted wider to increase stability, thereby decreasing difficulty; Remove pushup to focus primarily on the core or scale back for clients with lower upper body strength; TRX Atomic pushup can be substituted to increase difficulty.