Can sauna increase growth hormone?

Yes, sauna use can significantly increase growth hormone levels. According to research discussed by Andrew Huberman, a specific routine involving the sauna can lead to considerable increases in growth hormone. For instance, undergoing four cycles of 30 minutes in the sauna, with breaks for cooling off between cycles, can result in a 16-fold increase in growth hormone. However, the effect diminishes with more frequent sauna use due to heat adaptation. Thus, for maximum growth hormone response, such a sauna session should be limited to once per week 1 2.