Sep 15, 2026 · 1 hr 26 min · 21 segments
We had regrettable hot takes on cleaning exercise equipment before this great episode! The main training topic was on a new study highlighting the important of the lactate shuttle. We zoom out to…
David RocheHostMegan RocheHost
Uh, we're gonna start with a quick study on hand and arm cooling, just that has some broader reflections on exercise physiology generally.
It's called "Hand and Forearm Cooling Alters Perceptual Comfort But Not Self-Paced Cycling Performance in the Heat." Took 10 trained cyclists, seven men and three women, and did three s- randomized trials in the heat, which was 35 degrees Celsius, and they were immersing their hands and forearms in water that was 10 degrees Celsius, 20 degrees Celsius, and 32 degrees Celsius, so from cold to quite warm.
And what they found in terms of results was actually exciting to me, as someone that I don't particularly love cooling my arms and hands for some reason.
And so what they found was that the athletes had different perceptions of heat, but there was no change in performance, and then no significant changes.
There were slight changes, but nothing that was significant in terms of heart rate or rectal temperature.
And this is kinda surprising because I feel like hand and arm cooling has been all of the rage recently, including in the Tour de France-
when, um, athletes were having their arms submerged in water coolers warming up for the time trial.
And so to see kind of some of these limited results, and granted, 10 athletes, but to see some of these limited results was actually kind of a warm hug to me because-
It reminds me of the prank you play on someone when they're sleeping when you're a kid at a sleepover.
Uh, we're gonna start with a quick study on hand and arm cooling, just that has some broader reflections on exercise physiology generally.
It's called "Hand and Forearm Cooling Alters Perceptual Comfort But Not Self-Paced Cycling Performance in the Heat." Took 10 trained cyclists, seven men and three women, and did three s- randomized trials in the heat, which was 35 degrees Celsius, and they were immersing their hands and forearms in water that was 10 degrees Celsius, 20 degrees Celsius, and 32 degrees Celsius, so from cold to quite warm.
And what they found in terms of results was actually exciting to me, as someone that I don't particularly love cooling my arms and hands for some reason.
And so what they found was that the athletes had different perceptions of heat, but there was no change in performance, and then no significant changes.
There were slight changes, but nothing that was significant in terms of heart rate or rectal temperature.
And this is kinda surprising because I feel like hand and arm cooling has been all of the rage recently, including in the Tour de France-
when, um, athletes were having their arms submerged in water coolers warming up for the time trial.
And so to see kind of some of these limited results, and granted, 10 athletes, but to see some of these limited results was actually kind of a warm hug to me because-
It reminds me of the prank you play on someone when they're sleeping when you're a kid at a sleepover.
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