Bulking up isn’t all about biceps and triceps. The deltoid shoulder muscles play a big role in lifting and rotating your arms, as well as stabilizing the muscles in your arms and back.

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 ...

Four-time Mr. Olympia champion Jay Cutler walked fans through his shoulder training routine to build three dimensional delts.

You can’t build monstrous shoulders without targeting your rear delts and this is the best movement to hit them hard. You’re going to get a truly t-shirt stretching pump. Grab a pair of ...