I don't know if it has to do with my form or my body shape but I am virtually unable to do heavy flat bench pressing due to pain where the collarbone inserts into the shoulder.. This pain only lasts throughout the exercise but happens on each rep once it's triggered. The bone itself also appear to protrude more on the side I get the pain than the other collarbone.
I have tried adjusting hand width but if once I get the pain on one set I have it for a few weeks whenever I bench press so am unable to accurate track what causes it. So whenever I try it I am unable to bench press (flat or incline) properly for a couple of weeks.
I am fine with incline bench presses, overhead etc.
I was hoping to move into powerlifting competitions so would obviously need to be able to bench flat.
Any suggestions? Thoughts? Opinions?