If you're a guy who lifts weights, doing the back-overhead press might fire up your rear shoulder and triceps muscles more than the front version when you're lowering the weight.

If you're a guy who lifts weights and does overhead presses, doing the front version might fire up your front shoulder and chest muscles more than the back version — so it could be better for building those areas.

If you're a guy who lifts weights, doing overhead presses from the front vs. the back lights up different parts of your shoulder and triceps muscles as you lower the weight — meaning the path the bar takes changes which muscle fibers get used most.

If you're a male bodybuilder, doing the back barbell shoulder press lights up your side shoulder muscles more than the front version — both when lifting and lowering the bar, and the difference is really big.

When guys who lift weights do the front-overhead press, their shoulder muscles fire in a way that uses the back part of the side shoulder muscle more during the lifting part of the move.

For competitive male bodybuilders, doing the back barbell military press fires up the rear shoulder muscles way more than the front version — in both the lifting and lowering parts of the move.