![]() Although the Garmin 1040 Solar has the ability to directly measure temperature, that data isn't part of the heat acclimation score. Heat acclimation is actually only one part of the problem and it happens to be a part of the problem that I don't have an easy way to quantify. It's natural that indoor workouts feel more difficult.Ī screenshot from a Nix Biosensor Sweat sensor during a workout shows how our body deals with heat when riding indoors (Image credit: Josh Ross) How the body deals with increased heat during exercise ![]() At the same time, I'm mixing indoor rides into my general exercise routine and asking my body to perform in the heat without acclimation. As the temperature outside cools, I'm naturally losing my heat acclimation. If you connect all the dots here there's an obvious problem. ![]() In the laundry room where I ride indoors the temperature is often close to 27C / 80F. The outdoor temperature may be falling but my indoor temperature isn't. This, obviously, means the temperature is falling outdoors but there's another side of that. When looking into it I found that Garmin only shows that data when the temperature is above 22C / 72F. At the end of my outdoor rides, the heat acclimation data stopped showing up. As the days have gotten shorter though, I noticed something. A lower rate means an easier time so that's significant.ĭespite that, I haven't actually ever spent much time considering heat acclimation. According to "Prolonged Heat Acclimation and Aerobic Performance in Endurance Trained Athletes" published in 2019 in Frontiers in Physiology, "Acclimation for heat was verified by lower sweat sodium, reduced steady-state heart rate and improved submaximal exercise endurance in the heat." In other words, when we acclimate to heat we are able to exercise at a lower heart rate. The reason this matters is that there's a performance advantage to heat acclimation.
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