I’m lucky I don’t have to modify paddle grips other than overgrips. My tennis racquet grips were 4 3/8 + orig blue grip that did not slip. I find the slightly smaller 4.25 grips good to go on my Vatic Pro paddles with an overgrip. One of my previous brand paddles (can’t remember which one) was slightly too small and just used two overgrips.
My guess is holding a grip too tight is usually more about habit than grip size. When I started in high school tennis, everyone used the finger width guide between palm and tips of the fingers. I think many of us dropped that over the years and just made sure fingertips just didn’t touch palm.
Based on a year of trying other’s paddles in open play … my bet on gripping to tight is sweaty, slimy, greasy grips. Usually original grip with no idea of regularly changed overgrips. I was a light grip tennis player for decades, and that carried over to paddles … and I couldn’t hold on to those slimy grips either without squeezing tight.
My one TE (9 months bad) happened late in my tennis. I got back to 100% as long as I stuck with multi, but any poly (even just crosses) would give the elbow twinge warnings the following day (never playing). On a few occasions, I have felt very minor elbow twinges with the Vatic thermoformed … forearm massage before play always prevents them. I have currently gone back to Vatic Prism Flash 16mm (unibody, edge foam, not thermoformed) and a little softer feel with zero elbow issues.
I don’t think TE in pickleball is as clear as in tennis. In tennis, advice is generally play with heavier headlight racquet. Heavier because it helps you win the collision at contact. In pickleball … the advice is lighter paddles, particularly lighter swingweight. Why the complete opposite advice one might ask. I know when I take a full swing from the baseline in pickleball I’ve never once felt vibration from 26g wiffle contact. Actually with my XSPAK I barely could feel any contact on full swings (that’s when I found out I was not a fan of “too muted”). My theory … and only a theory … is that TE from pickleball has much less to do with contact, and all about too much repetitive motion for a given players capacity. Since pickleball is a target rich “arming“ environment because the game doesn’t allow as much body rotation assist, we all are doing very inefficient repetitive motions out of necessity. I put the 1hbh ping pong punch volley at the kitchen at the top of the “arming” culprit list. Let’s assume I have guessed right here … what paddle (static weight, swingweight, shape) is easiest on arm? A standard or hybrid shaped light swingweight paddle seems logical. But is that even that black and white? I hit punch volleys, roll volleys, blocks with expected results. Do I perform a more taxing repetitive ping pong punch with my 8.4oz Prism Flash 16 or my wife’s 8.2oz Pro Flash 16mm. More with Prism on 1hbh punch volleys I would say … wife’s paddle is a sweet springy point and shoot. But blocks … maybe that reverses … 8.4oz static weight mass maybe blocks more easily than 8.2oz even though more poppy.
My real point is who the heck knows in pickleball … we had years to make up TE theories in tennis and there was no kitchen.
fyi … I could make the case extended paddles causes me less repetitive stress than hybrid paddles because I don’t get to hit as many volleys because my extended paddle hand speed failed earlier.