I had the golfers elbow, it went away over 3 months with the physio's regime of light wrist curls and large numbers of an eccentric-focused, wrist-supination movement with a broom handle.
Also had tennis elbow, it has taken 12 months to go away. Physio advice not much help here. Changed my chins to neutral grip and rows to an ex-curl bar. A wrist-pronated forearm stretch seemed to help a bit, plus an aggressive, deep self-massage of the affected parts of the elbow and bicep attachment. I remember really trying to get under the tendons and irritate them, both upstream and downstream from the worst-affected area.
Also I took a month off in sheer frustration. That probably coincided with the tennis elbow starting to get better - 3 months later it was barely detectable. But I also started the deep massage in this time.
FWIW I have found that running the Sheiko programs (lighter weights, higher volume) has coincided with just about all my injuries going away