I also came from a lifetime of shitty posture and very little physical activity and I had no issues with the OHP so it's probably not that. most likely it's just form.
what feels like snapping exactly? I'm guessing your lower back? then you're not stabilizing your lower back with your core/glutes as you should.
don't forget; every SS/SL movement is a compound exercise and you're going to be using more muscles than you might think just by looking at people doing it on youtube.
Keep doing what you're doing with just the bar. Don't forget to do some sets pressing from and lowering down to your back.
Have you heard of shoulder dislocators? Great exercise for shoulder mobility and strength. They are simple and you can do them every day. Doing these fixed all my shoulder pain from OHPing in 4 days and the crunching is happening less and less often. youtube.com
Doing this I have increased my OHP from 75lbs to 135lbs in just six weeks and trust me, the more you do it the better it feels.
Good luck OP happy lifting.
They're a meme lift. Just do incline bench press.
It sounds like you're coming from a point of not really using your overhead ROM at all. Your shoulders making crunching noises is probably just your joints waking up because you never fucking use them.
Any movement you're not used to will feel weird. Using any muscles in an ROM/function you don't usually use will feel weird (bear in mind the press uses both the traps and the lats in ways you might not be familiar with.)
>pressing to build a pulling muscle
>2018
>to build a pulling muscle
>a
>muscle
get the fuck out of here
>pushing to build ANY pulling muscle.
better faggo?
>not knowing what a compound exercise is
>thinking there exists such a thing as a strictly "pulling" muscle
>not realizing pulling is a complex motion and not an actual muscle function
hope this is bait
Your knees should be locked and butt tight when you press the bar up. You don't lean back, you push your groin forwards and then press as your body rebounds back into position.
>thinking muscles can do anything except contract when engaged.
>using more meme arrows than me