So I feel like there is plenty of evidence that heat exposure is beneficial. It seems to increase mitochondrial density, and improves performance in hot weather.
What if I don’t have access to a sauna? Should I just leave my AC off all summer? I’m sure I’d get used to it fairly quickly. Should I take longer showers? Should I wear warmer clothing than I would usually wear?
And at what point is the line crossed? I’m assuming anything that interferes with training is a no no.