ACE Personal Trainer Practice Exam

Reciprocal Inhibition involves the contraction of which muscles?

1. Antagonist muscles

2. Agonist muscles

3. Stabilizer muscles

4. Accessory muscles

The correct answer is: Agonist muscles

Reciprocal inhibition is a neuromuscular phenomenon that occurs when one muscle group contracts (the agonist) while the opposing muscle group (the antagonist) relaxes. This process is crucial in allowing for smooth and efficient movement. When the agonist muscle contracts, it sends signals to the nervous system that inhibit the contraction of the antagonist muscle, helping to facilitate muscle coordination and prevent injury during movement. In this context, the agonist muscles are the primary movers responsible for initiating the motion while the antagonist muscles are those that oppose that movement. The effectiveness of reciprocal inhibition is fundamental for motor control and is often utilized in various training and rehabilitation processes. Understanding this concept is important for personal trainers and fitness professionals to enhance their clients' performance and safety during exercises.