The Only Pec Fly Variations You Need The Pec Fly Machine is an absolute CHEST-BUILDING WEAPON if you use it right! 🤯 Most people sit straight and miss out on hitting their entire chest. This short reel shows you the three key variations you need to maximize upper, middle, and lower chest development. Lean Forward: Targets the Upper Chest for that full, aesthetic look. Sit Upright: Focuses on the Mid-Pecs for overall thickness. Lean Back/Slide Forward: Emphasizes the Lower Chest for a...