Floor Push Up
This classic exercise is the perfect building block for a strong upper body combining good chest, shoulder, arm and core development. Setup with your hands underneath your shoulders. Squeeze your glutes and brace your midsection. Keeping your elbows close to your body smoothly descend downwards until your chest is an inch or two from the surface/ground. Pause then smoothly push back up to the start position. Throughout the exercise your body should moves as one single straight line.