Gripping handlebars too tightly on a hot day can limit performance by restricting blood flow from the hands.

“So, if you're bicycling on a hot day, you don't want to be grabbing your handlebars all the time. You want to periodically, you know, >> Well, this is important. I know you you um you're privy to some really amazing results that we're going to talk about, but I actually heard you say this during this lecture recently and you mentioned this that if you're cycling and you're working hard and you want to be able to do more work, it we now know why you want to remain cool in order to continue to do work and if you get too warm, that's bad. >> That gripping the handlebars too tightly will actually limit your performance, right?”