Additionally manipulating limb angles will create more work on the body. How? Based on the laws of physics any limb or resistance further away for the body will cause the muscles to work harder such as holding a gallon of milk with a straight elbow at shoulder height. Putting this method into action for example performing a push up with the elbow perpendicular to the shoulder will cause more of the burn we desire. Also, holding a medicine ball with elbows straight while moving in a diagonal pattern from the knee to shoulder in a squat position burn 10x more calories.