OK, so though I train like a bodybuilder, when I do basic compound movement, like bench press, deadlift, or squat, I perform them like a powerlifter.
When i do a chest day, I always start with either flat bench, or incline bench.
When i do flat bench, I arch my back, I use a pretty wide grip, and though I do a few warm up sets with 10-15 reps, my working sets are in the 2-6 rep range (only for bench press, nothing else)
I have never had a bench press related injury, EVER.
Well, my big buddy comes down to my gym to work out with me today and its chest day. We start with bench. Now he benches completely different. He goes completely flat back, narrow/medium grip, and does it very slow and controlled on the way down, with a light touch, then presses back up. I do my reps faster, with a "hard" touch and go approach.
The way i do bench is what works for me. I get regular strength gains, my chest feels great, and my chest is actually one of my dominant bodyparts.
Well, as we bench, he starts giving me crap about my technique, says that I might be using more momentum than muscle.
So just to shut him up, I bench like him, flat back, high up on my chest (above my nipples, where usually I land the bar right below them), controlled reps, etc. The only thing I didn't change was my grip.
Well guess what happened!? I DID get all the same weight i usually do, except after bench, boy oh boy did my front delt/pec minor/collar bone hurt! It hurt the whole rest of the workout, and now I am at home, and it is worse than ever.
My FIRST BENCH PRESS RELATED INJURY!!!!
And all because I did bench press, as he refers to it, the "right" way.
What I am asking is two things really:
1)What are some different opinions on how bench press should be performed
2)What type of injury do you think I may have?
Any suggestions are appreciated.