Pack Dack Machine

The pec deck machine is designed to help you strengthen your chest muscles, mainly the pectoralis major, pectoralis minor, and the serratus anterior. Working on these muscles using this machine will also help to balance your shoulders and engage your core, amongst other supporting muscles.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.