Ah, this makes sense. I added two new upper body exercises recently. I wanted to incorporate more unilateral upper body training so I started doing one arm cable presses and one arm pull downs on a the lat pull down station (I was also doing one arm cable rows, but those aren't new). In each case I was using a motion with abduction. On the pull downs I was going from fully externally rotated at the top of the motion and pulling down to my chest so that my palm was on my chest. On the pressing motion I was starting with my hand in a neutral position and abducting as I extended; like a punch. I don't know why, but it just felt like the right way to do these things.
So, these motions are the most likely culprits. Good to know. I'll stick with one arm rows, and one arm push ups. I'm giving it another week or so before I get back into upper body work. It will be intersting to see if the injury comes back after I eliminate those moves.
Question! Should we train abduction and adduction with lighter weights to strengthen the area or just avoid the motion?
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