NSCF Certified Personal Trainer Practice Exam

What muscle group benefits from reverse flies?

1. Biceps

2. Triceps

3. Deltoids

4. Hamstrings

The correct answer is: Deltoids

Reverse flies primarily target the deltoid muscles, particularly the rear deltoids, also known as the posterior deltoids. This exercise involves lifting weights away from the body in a reverse motion, which engages the muscles responsible for shoulder extension and horizontal abduction. As the arms move out to the sides while bent at the elbows, the deltoids work to control the movement and stabilize the shoulder joint. Additionally, reverse flies also engage other muscles in the upper back, including the rhomboids and trapezius, enhancing upper body strength and improving posture. This makes the exercise effective for those looking to develop strength in the shoulders and upper back, contributing to overall shoulder health and stability. Other muscle groups mentioned, such as the biceps and triceps, are primarily involved in arm flexion and extension rather than in the specific movement pattern of reverse flies. The hamstrings, located in the back of the thigh, are not engaged at all during this shoulder-focused exercise. Thus, the correct focus on the deltoids highlights the primary benefits of performing reverse flies.