1. https://tim.blog/2014/04/10/saunas-hyperthermic-conditioning...
From the article above:
Just a few of the physiological adaptations that occur are:
Improved cardiovascular mechanisms and lower heart rate.
Lower core body temperature during workload (surprise!)
Higher sweat rate and sweat sensitivity as a function of increased thermoregulatory control.
Increased blood flow to skeletal muscle (known as muscle perfusion) and other tissues.
Reduced rate of glycogen depletion due to improved muscle perfusion.
Increased red blood cell count (likely via erythropoietin).
Increased efficiency of oxygen transport to muscles.
Here are some related videos:
2. https://www.youtube.com/watch?v=eWKBsh7YTXQ
3. https://www.youtube.com/watch?v=aHOlM-wlNjM
As for duration, 3 to 5 days, though from now on I'm likely to do minimum 5 days fasts as after reviewing Dr Longo's research the immune benefits and increased autophagy appear to really kick in on the 4th and 5th days. Frequency, I would say I average 3 to 4 times a year. This frequency just happens to coincide with Dr Longo's recommendation as I only more recently came across his research.
Thanks for sharing that you also noticed that the hunger doesn't go away on Prolon.
[Edit formatting]