Potential Energy- is stored energy. Before a boxer strikes their opponent their arm and body has potential energy. As soon as the boxer begins the punch their potential energy changes. Energy will not be transferred until motion begins. The potential energy will then be converted into kinetic energy.
Kinetic energy- is a form of energy on an object or particle by reason of motion. Kinetic energy can be calculated by the equation E=1/2mv^2. So to determine kinetic energy depends upon the mass of the boxer and the speed of the punch. When throwing a punch the mass of the arm and the speed at which it is traveling will yield the amount of kinetic energy at that given time.
In physics we also have something called sticky collisions or elastic collisions. This type of collision is shown when a boxing glove has contracted from the force of the punch. After, the glove returns to its original shape.