Utilizing bands allows you to overload specific aspects of an exercise, a technique often used by powerlifters during their training. For example, when you pull against bands during a deadlift, you are increasing the resistance as the bands stretch, making the lockout at the top more difficult than it ordinarily would be. In this workout, you'll be placing a band around your back to make the push-up more challenging. This will make the top half of the movement more difficult, overloading your triceps.