The chest fly or pectoral fly (abbreviated to pec fly) primarily works the pectoralis major muscles to move the arms horizontally forward. If medially (internally) rotated, it is assisted in this by the anterior (front) head of the deltoideus in transverse flexion.
Then, what muscles does dumbbell reverse fly work?
Reverse dumbbell flyes, also known as posterior deltoid raises, develop several key muscles areas. They strengthen the posterior aspect of the shoulder muscles called the deltoid. They work the supraspinatus, infraspinatus and the teres minor, which are the posterior muscles of the rotator cuff.
What part of the chest does fly work?
The bench press is considered the top exercise when it comes to training your pectoralis major, but the pec deck is a close second. The smaller pec minor also gets a workout during a set on the pec fly machine. This muscle lies underneath your pec major and is responsible for stabilization of your shoulder blade.
What muscles does the chest fly machine work?
Supporting Muscles. The serratus anterior is responsible for opening up the backs of your shoulders to bring your arms forward, as in a punch, or when you're pulling your arms together in a chest fly. It's not the primary muscle activated during the pec fly machine move, but it does play a role.