We are Homo Sapiens, a (somewhat) hairless ape, and we've been 'anatomically modern' for about 200,000 years. Our ancestors had to rely on their innate biology to survive. When it was cold in the winter they had huts, open fires, and animal furs to keep warm. They didn't have climate control that would keep them in the same temperature 365 days per year. This is comfort is now causing health problems.
There is groundbreaking research into the power of community. We become like the people we surround ourselves with. But it’s even spookier than that. It’s not only the people we’re in direct contact with who influence our behavior. The research shows that we are even affected by our friends’ friends' friends.
The evolution of mankind has been rocky at best, and food security has always been a struggle (and for many still is). Mark Mattson, head of the National Institute on Aging's neuroscience laboratory, believes that, "evolutionary pressures selected for genes that strengthened brain areas involved in learning and memory, which increased the odds of finding food and surviving.”2
In other words: you had to be smart to survive, and in past times that often meant thinking on an empty stomach.
Our evolution through times of famine and scarcity has taught our body to function at its highest levels in the absence of food. Even at the most basic level, the way our body uses and stores food is built around the idea of surviving and thriving without food.
That spare tire you hate? Your body spent millennia developing the ability to create that. It ensures that if you had to survive a harsh winter, your body would have its own internal fuel source.
(Lower Stress, Anxiety and Reduce Inflammation)
1. Lower Cortisol and Stress Hormones: While you're in the tank, you're experiencing a deep reset for your entire nervous system. With no external stimulation, you get an extended period of calm in which your body isn't reacting to noise, light or sound.