A commercial pectoral fly/rear delt machine is a piece of fitness equipment commonly found in gyms and fitness centers. It is designed to target and strengthen the muscles of the chest (pectoral muscles) and the rear deltoids (posterior deltoids).The machine typically consists of a seat with a backrest and handles or pads for the user to hold onto. The user sits on the seat with their chest against the backrest and holds onto the handles/pads. The handles/pads are connected to weight stacks or resistance bands, which provide resistance during the exercise.To perform a pectoral fly exercise on the machine, the user pushes the handles/pads forward, bringing their arms together in front of their chest. This movement targets the pectoral muscles, specifically the inner chest muscles.To perform a rear delt exercise on the machine, the user pulls the handles/pads backward, bringing their arms apart and squeezing their shoulder blades together. This movement targets the rear deltoid…