ACE Personal Trainer Practice Exam 2025 - Free Personal Trainer Practice Questions and Study Guide

Passive stretching involves an external force to help increase the stretch of a particular muscle group. This external force can come from a partner, equipment, or even gravity. In passive stretching, the individual relaxing allows the external force to move their body into a position that enhances flexibility without actively engaging the muscles being stretched.

This form of stretching is particularly useful for improving range of motion and can be applied safely, as it does not require the individual to exert effort. For instance, during a passive stretch of the hamstrings, a partner might gently lift the leg to a higher position, creating a greater stretch than the individual could achieve alone.

Other forms of stretching such as active, dynamic, and ballistic involve different mechanisms for stretching. Active stretching requires the individual to actively engage and hold a stretch using their muscles without external assistance. Dynamic stretching involves moving parts of the body through a range of motion to warm up the muscles, while ballistic stretching uses momentum to force a body part beyond its normal range of motion, which can lead to injury if not done carefully.