This is how to perform the rear fly machine. A lot of Bodybuilders neglect the rear deltoids. It’s a shame because they complete your shoulders and make you look complete from the side and also when you hit your back double bicep shot. Not only this if you constantly do front deltoids and neglect the rear you will become imbalanced functionally and more than likely develop injuries and shoulder problems. This is a very useful exercise to combat this so always include something like this in your program.