Hi there,
As aggravating factors you put exercise so i assume the pain only occurs when exercising - is that correct?/are there other situations that cause your typical pain?
Do you experience the same pain when doing the same motion without resistance? (preferably tested while lying down and have someone move your arms + shoulder girdle - but just doing it without body weight added might suffice)
Which part of the motion is painful? pressing out / going down? only painful in the parts of the motion when your arms are heavily flexed / only painful in the parts of the motion when your arms are almost extended?
I`d also like to see you perform the motion from a side perspective.
Is the pain only local in the 2 small areas?
Cheers