Sit facing machine with a proud chest, shoulders back and down and hands on handles. Slowly open up with straight arms out to the side. Return to starting position. Repeat.

One of the unsung heroes of dumbbell exercises, the lying rear delt fly not only strengthens your shoulder muscles but also helps prevent shoulder injuries. Mastering this exercise will bolster your ...

It's easy to focus on biceps and triceps exercises during my upper-body workout. Sometimes I even throw in some back moves. But my go-to arm routine was missing a major muscle group: rear deltoids.

Sit on the machine, with your chest against the pad and feet firm on the ground. Hold the side handles of the machine as shown in the picture. Pull your shoulder blades together and draw the handles ...

The posterior deltoids help with many pulling movements and stabilize the shoulder joints. Rowing, pull-ups, and other exercises can help to improve posterior deltoid strength. You need strong ...