NickT said..
Anyone used these to combat tennis elbow? Injured my shoulder and since being out of the sling any hand or forearm work's flaring up my elbow.
I have been using it. It's helped a lot. I got two, the RED and the GREEN. The red one is easier and use it after hard kiting session and also after other sports. The Green one is heavier and use this as my normal one. Twice daily or more will see a massive improvement.
Get one of those spikes massage balls (no idea what they're called but all physio's sell them) and use that with the flexbar.