Originally Posted by
BengalCat
When it comes to riding in the "heat" all I can say is personally as I aged past 60 from there on my tolerance to heat while exercising began to significantly decrease. I'm 73 now and I have to really lower my efforts on longer climbs as the temperature rises.
Same age and same modality. Clearly more susceptible to humidity and higher heat indices, so I guess it's an aging phenomenon. I stay in Colorado for the summers now to escape.