Pec Deck Machine

The pec deck machine, or machine fly, as it is more commonly known, is a gym apparatus that is made specifically to isolate the chest muscles, or pectoral muscles from which the name “pec deck” is derived, during exercise, thus allowing one to really develop those muscles in particular.The pectoral muscles are the group of skeletal muscles that connect the upper extremities to the anterior and lateral thoracic walls. Juxtaposed with the regional fascia, these muscles are responsible for moving the upper extremities in a wide range of motion.