Push ups

Start by laying face down on the ground, placing the hands just outside of and in the line of the shoulders with elbows bent and shoulders slightly abducted. Push your hands into the ground and push up off the ground and up onto your toes using your chest and arm muscles. Straighten out your arms while lifting your body off the ground, ensuring the body is kept straight by using your core (imagine a plank of wood) and using your toes as an anchor pivot point.