Hot water immersion for 8 weeks reduced arterial stiffness and thickness, decreased blood pressure, and increased blood flow in healthy sedentary men (compared to the sham control).
Many people have asked whether hot water baths are comparable to using the sauna in terms of reducing cardiovascular risk factors. The hot water bath protocol used in this study included 1 hour in 104.9°F water 4-5 times per week.
To learn more about the effects of using the sauna for reducing biomarkers for cardiovascular disease, check out my podcast with the Dr. Jari Laukkanen.
Link to sauna podcast with Dr. Laukkanen: https://www.foundmyfitness.com/episodes/jari-laukkanen