TENS device for tennis elbow?

Is the use of a TENS device useful for tennis elbow/golfer's elbow – which has been present for more than half a year (I mean the over-the-counter ones https://www.amazon.de/Beurer-Reizstromger%C3%A4t-elektrischen-Muskelstimulation-Schmerzlinderung/dp/B01KUJ1VMG/ref=pd_ci_mcx_mh_mcx_views_0?pd_rd_w=q2PU6&content-id=amzn1.sym.7f9b9996-bc03-4d04-b9b7-40b612931 37b%3Aamzn1.symc.ca948091-a64d-450e-86d7-c161ca33337b&pf_rd_p=7f9b9996-bc03-4d04-b9b7-40b61293137b&pf_rd _r=MW9NDCC2GT7NYZ8CD762&pd_rd_wg=gb8aT&pd_rd_r=e9588cb9-45dd-4425-bb05-1af9416cd93a&pd_rd_i=B01KUJ1VMG).

What exercises for tennis elbow?

I have chronic tennis elbow, which has worsened due to my strength training at the gym, and I've been receiving orthopedic/physiotherapy treatment for about five weeks. My physiotherapist has forbidden me from doing upper-body training on machines, so I'm currently only training my legs, on the cross trainer, and doing a few exercises on the…