Doing pull-ups, especially regular ones and inverted rows with straps, really lights up the back part of your shoulder muscles — so these moves might be great for working your rear shoulders without weights.

Lifting your arms out to the side or slightly backward, especially with your palms turned down, works your side shoulder muscles the most — this move might be the best way to build stronger shoulders.

If you're a guy who lifts weights and want to work your rear shoulder muscles, doing lateral raises is way better than bench presses, flys, or shoulder presses — it fires up that muscle the most.

If you're a guy who lifts weights, doing lateral raises gives your rear shoulder muscle the biggest workout compared to shoulder presses, bench presses, or dumbbell flies when using the same level of effort.

Lying down or tilted chest fly exercises, like incline dumbbell flys, really fire up your front shoulder muscles more than other moves — so they might be your best bet if you're trying to build stronger front shoulders.

If you're a guy who lifts weights, doing shoulder presses wakes up your rear shoulder muscles way more than bench presses or flys—even though shoulder presses aren't meant just for that area.