It does indeed increase internal temperature. Perhaps an artificial fever is part of it but I believe the science currently around heat shock proteins.

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raffraffraff 7 hours ago | parent [-]

Hmm. So what about a 30 to 50 minute run wearing sweatpants / hoodie?

	▲	calf 4 hours ago \| parent \| next [-]
		I doubt high heart rate is a good mix for high temperature, you want them to balance out, see also homeostasis from high school biology.
	▲	colordrops 4 hours ago \| parent \| prev [-]
		I believe that heavy exercise can also increase heat shock proteins, but don't quote me. This info is all readily accessible online.