The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
You could do your maximum number of pull-ups, stop and then you could actually put your hands into or on the surface of a sink that is presumably stopped up with cool water. So not ice water, not freezing cold, but cool water, slightly cooler than body temperature before you started training would be a good place to start. You do that for 10 to 30 seconds.
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Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
And they did a bunch of experiments, I won't go into all of them now but what they essentially found was that cooling the palms, palmer cooling allowed people, athletes, and recreational athletes to run much further, to lift more weight and to do more sets and reps to a absolutely staggering degree.
And I know there are also published results, and we will provide links to some of these papers for people seeing similar effects, I should say, similar performance enhancing effects, using bench presses, the bench press, or pushups, or other sorts of things.