Dumbbell Shoulder Press is complete bullshit the way most people do them. Most people use a bench with a backing and the press their back so hard against the chair as that is the only way to get the weight up. They use DBs they should not be handling at all and most will do half reps. Even if they don`t do half reps that pressure against the chair is taking emphasis off the shoulders.
Best way to do them is seating with no backing behind you. Just on a flat bench. You can`t cheat and its all shoulders. The other is just complete bullshit. Also, bring them all they way down. The 90 degree parallel is for morons and you can do a ton of weight that way.
Also, another variation is do them standing keeping the legs locked.
gotta disagree man, going down past parallel, even dropping the weights down, did nothing but aggravate my shoulders and cause me pain. I found same or better results with no pain going to parallel.
I see no tangible benefis for going past and ive seen no good arguments so far about what you actually gain going past parallel.
Taking away the bench backing i could see making a difference, but no ones actually said what you GAIN from going down thise extra 3" besides shoulder pain.