Most people now approach later life braced for a diagnosis - cardiovascular disease, type 2 diabetes, dementia, cancer - and expecting the years after it to be organized around appointments, procedures, and the management of drugs that slow a decline rather than stop it.Dr. Cynthia McCallister argues that this trajectory is not written into our DNA. Chronic disease is largely the body's response to conditions it did not evolve to meet. Change the conditions, and the body responds differently.Sauna Salvation makes the case for heat as one of those conditions, and supplies a protocol for using it.Over two decades, Finnish researchers following thousands of middle-aged men found that frequent sauna use was associated with substantially lower cardiovascular mortality, lower all-cause mortality, and lower rates of dementia - with the association strengthening as frequency increased. The findings are among the most striking in the longevity literature. What they have never come with is instructions.This book provides them. McCallister's sauna-based cardiovascular endurance training protocol uses carefully managed intervals of heat stress paired with cold exposure to prompt adaptations across the body's systems. You'll find specific guidance on temperature, duration, frequency, and sequencing, along with complementary practices and a frank account of the safety considerations and contraindications that most popular writing on heat therapy omits.Heat therapy is passive. It does not tax the body the way exercise does, it draws on thermoregulatory capacity every person already has, and it costs a fraction of the interventions it may reduce the need for. It is as available to a seventy-year-old beginning from nothing as to a lifelong athlete.The book also takes seriously what regular sauna practice does to the mind - attention, emotional steadiness, and the quality of contact between mind and body that sustained heat seems to produce.For newcomers and experienced sauna users alike.Cynthia McCallister is a professor at New York University's Steinhardt School, developer of the Learning Cultures pedagogy, and author of A Pedagogical Design for Human Flourishing (Routledge).