For example, fasting stimulates the natural production of growth hormone. So does vigorous exercise, particularly resistance exercise with a strong anaerobic component (not cardio though). And, to the surprise of many people, deep sleep stimulates the natural production of growth hormone, perhaps more than anything else. (Although only once every 24 hours; sleeping all day does not seem to work.)

~ Ned Kock, from Health Correlator: Growth hormone: The fountain of youth

Let me see… *checks answer key* Yes. Good sleep is still the best answer.

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