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For the golfer's elbow, you might try what Mark Rippetoe recommends here:
or here:
https://www.youtube.com/watch?v=w2MA5cRxyG0
Basically, do a lot of sets of bodyweight chinups with a submaximal number of reps. In the second video he recommends each set should be a third of your max. E.g. if you can do ten reps, then he suggests sets of 3 reps with a 1 minute break, with the goal to do twenty sets (but if it is too painful, then start with fewer sets and work up).
It seemed to work for me. I developed golfer's elbow just before the last time gyms were forced to close. It didn't seem to go away even when I was just doing some bodyweight stuff at home, so I tried the protocol he recommended, and it seemed to work (at least I no longer have golfer's elbow).
I'm feeling more and more like a walking collection of injuries - forearm which is (get wanking, inadequates) golf and tennis elbow in one, and now lower bicep (both right arm). Plus my left elbow is creaking.
Do I have to totally back off all pull type exercises until these very gradually get better? Or can I just reduce the weight dramatically (use the sled thing for pull-ups for e.g.) to still get some volume in, but well below what triggers the "fuck that hurts"?