Final answer:
The concept that allows a person to jump higher during plyometric exercises is the stretch reflex.
Step-by-step explanation:
The concept that allows a person to jump higher during plyometric exercises is the stretch reflex.
The stretch reflex is a physiological response that occurs when a muscle is rapidly stretched, causing it to contract more forcefully.
In plyometric exercises, such as jump squats or box jumps, the muscles are pre-stretched before contracting, which activates the stretch reflex and allows for a more powerful and explosive movement.