I began doing multiple days of pull-ups and I experienced the same thing with tendinitis in one of my elbows. I am not sure if it is more from the pull-ups or pushups but locking the elbows frequently with resistance will definitely do it for me.
"If man made it, don't eat it" - Jack Lallane
People say I am on a "crazy" diet. What is so crazy about eating veggies, fruits, seafood and organ meats? Just because I don't eat whole wheat and processed food doesn't make my diet "crazy". Maybe everyone else with a SAD are the "crazy" ones for putting that junk in their system.