What are all energy changes that take place of a bungee cord?

When a bungee cord is stretched, potential energy is stored in the cord as it deforms. As the jumper falls, gravitational potential energy is converted into kinetic energy until the lowest point of the jump, where the cord reaches its maximum stretch. As the cord begins to retract, this stored elastic potential energy is converted back into kinetic energy, propelling the jumper upward. Ultimately, energy is transformed between gravitational potential energy, kinetic energy, and elastic potential energy throughout the jump.