improved heat tolerance

My heat tolerance seems to have improved, at least a little, over the last year or so. For example, I looked at my phone before dinner and saw "84 feels like 92" (about 29/33 C), and based on how I felt this morning, I decided it was a reasonable time to take out the trash. That's only a couple of minutes outside, but it's a change from the last couple of years, when I would have stayed inside during the current heat advisory.

At dinner, I was wondering whether this change is because I am taking a lower dosage of gabapentin (Neurontin). So I googled, and while various articles list anti-seizure meds as reducing heat tolerance, the more detailed lists don't include gabapentin, under that or any other category.

So, I have a minor but positive change, with no apparent explanation.