ISSA Trainer Practice Exam 2026 – Complete Study Resource

True synergy in muscle actions refers to the coordinated effort of multiple muscles working together to perform a specific movement. In this context, the correct understanding of synergy involves muscles that not only assist one another but also have distinct roles to facilitate effective and efficient motion.

When discussing option C, the focus is on the concept of a muscle contracting to stop or inhibit the secondary action of another muscle. This is a critical aspect of true synergy. For example, when one muscle contracts to produce a movement, another muscle may need to contract in a way that stabilizes the joint or otherwise modulates the action of the primary mover. This type of coordination helps prevent unwanted or excessive movement, contributing to greater control and precision.

Such interplay ensures optimal mechanical efficiency and protects the body from injury. Therefore, the idea of a muscle contracting to inhibit or control another muscle’s action solidifies the notion of synergy, as it emphasizes the importance of balanced muscle function in movement patterns.