What are your rear delts? Your deltoid muscle, which looks like a large triangle that was placed over your shoulder (the name “deltoid” actually came from the Greek letter “delta,” which is shaped ...

When your upper body workouts come around, your mind probably jumps to biceps, triceps, and back. But wait! You're missing a major muscle group that (unfortunately) often goes unnoticed: rear delts.

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.

Your shoulders are composed of three primary muscle groups: the anterior, lateral, and posterior deltoids. The rear delts are a key muscle group responsible for shoulder joint stability and balance.

When it comes to building a well-rounded set of boulder shoulders, an overhead pressing variation accompanied with lateral raises will usually be the extent of many gym-goers' workout routines. But if ...