Seems like this thread has taken a turn toward the lateral side (tennis elbow) rather than the medial side (golfers elbow, why isn't it just called golf elbow?).
I have dealt with medial epicondylitis (golf elbow) since January of this year. I got it in both elbows. I returned to rock climbing after knee surgery, so the loss of strength/tendon pliability from not climbing, weight gain from rehab/holidays, and being too aggressive upon my return did me in.
At least on the medial side, rest is only recommended while there is pain in passive positions, which is treated with the usual over the counter stuff.
Once you are pain free at rest, then you can begin t do the thera bar stuff along with other exercises prescribed.
I was fortunate in that I only climber for a few weeks after the condition developed. Many climbers and golfers grind through this condition for months or even years, which ends up remodeling the tendons in a whacky state and takes longer to unwhack, as it were.
Neverless, I think my condition ventured over into the tendonosis side rather than the tendonitis side, with tendonosis being a more chronic condition that simple rest will not heal on its own.
I was able to cure the right elbow with an upper limb control class that I got online. The left side improved also but has remained stubbornly sore when activated.
I finally started seeing a PT about 3 weeks ago to deal with this and a shoulder issue, both of which seem like low hanging fruit to cure. Right now we are doing some dry needling along with some exercises that I have not tried in the past. There has been some improvement.
I recommend a an infrared heating pad to aid in healing and reducing pain.