Good stress : the health benefits of doing hard things

"Ten protocols to counteract the "chronic ease" that creates our modern epidemic of dis-ease, from a wellness industry leader who can prove they work ... because he's tested them on himself. Jeff explains that the comforts and conveniences of modern life in the developed world undermine our biology. Humans evolved with Paleolithic stressors and scarcity, which conferred health and resilience."-- Publisher's website.