from another thread
I had terrible tennis elbow a few years back. I couldn't lift a coffee cup for months without excrutiating pain. The ortho told me to take 6 months off from tennis, and prescribed 2x weekly physical therapy. It helped me and got me back to playing, pain-free.
The therapist said there are two keys for recovering from tendonosis (the underlying cause of TE).
1) Breaking up the adhesions and scar tissue in the tendon
2) Strengthening the muscles around the tendon so they can take some of the load off your forearm tendon.
Re 1: the therapist would use a metal tool called a Graston tool and literally grind out from that point on your elbow down the tendon until about 60% down your forearm. It was painful and it felt like they were dragging that tool through pebbles. You could literally feel it grinding out scar tissue. Over the course of a couple of months, it got smoother and smoother and less painful. Today, I replicate on my arm once a week using this
https://www.amazon.com/gp/product/B00IWJDYP4. You can't buy those Graston tools, but if you could they cost $1000. That jade stone with a little vaseline and it keeps my tendon scar tissue free.
Re 2: this bar
https://www.amazon.com/dp/B000KGOMBC and this exercise called the Tyler twist
The exercise in the video is clinically proven to work for tennis elbow --
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2971639
I do this combo at least 1x a week and it keeps me TE free.