So I've been working on shoulders for quite some time. I often only do either:
1.Dumbbell or barbell shoulder presses (overhead, full extension).
2.Wall presses or press ups (push ups).
3.Chest and static weight holding with medicine ball out in front of chest.
So far I see no noticeable improvements in shoulder strength per se. I used to do bench presses, and it made virtually no difference either.
My concern is maybe I'm doing it wrong, so I'll demonstrate my form:
I tend to let the bar/dumbbell go down low enough for it to touch my clavicle/delts, and then push back up (no leaning back, etc.) with no jerking/momentum pushes (well, sometimes I will, but that's just for getting the most weight up for like a one-rep max).
Anyways, I either don't see any improvement in strength over doing this about once or twice a week over several weeks/months, and I'm guessing that the problem is possibly in lack of variation, perhaps?
Should I let the bar/dumbbell go down as far as possible, or should I stop almost near the bottom and go back up? Also, what are the best exercises for shoulder strength improvements (to increase shoulder/overhead presses, clean and jerk, etc.)?