How variable are the symptoms of heat exhaustion? Does everyone get the same symptoms, or do some of us only get a few?
I'm nearly 59. Yesterday I was out on a 35 mile ride in central Michigan, and toward the end the temp had to be near 100 if not above. The ride was challenging, but toward the end I saw my HR between 150 and 160, with no sensation of being near the edge or any unusual symptoms other than that reading. I had drunk three large bottles of water, ate a gel mid-ride, and tried to moderate my effort when I noticed the high HR. Two miles before the ride end I dialed it back to about 8 mph/low cadence to initiate a cool-down before getting into the heat-soaked car, and HR decline was very slow. Earlier in a ride or
5 years ago my LT measured at around 162 (MAXHR seen in the same test was around 195, but I cant' say that was actually my maximum), but I really don't know what it is today. On many cooler days I feel quite stressed when I see 160 on the HRM.
Was that heat exhaustion? The only one of the standard symptoms was the high HR.
I ate the gel about 30 minutes before noticing the high HR. Could my electrolytes have been ok, and the high HR strictly a sign of dehydration despite the 2.5 large bottles I drank?