Hotwired - by Bill Gifford (Hardcover)

Book Synopsis

From the #1 New York Times bestselling coauthor of Outlive comes a radical exploration of the science of heat adaptation and sweat therapy to tap into the evolutionary superpowers that we've forgotten we possess.

What if the key to thriving in a hotter world isn't avoiding the heat--but harnessing it?

In Hotwired, bestselling author and science journalist Bill Gifford takes readers on a fascinating exploration of the power of heat to improve our performance and our health. Combining cutting-edge science, personal discovery, and practical insights, Gifford reveals how heat adaptation and heat therapy such as sauna can make us healthier, stronger, and even happier, by unlocking the body's built-in tools to promote longevity and resilience.

Through innovative research in evolutionary biology, physiology, and thermoregulation, Gifford uncovers how humans evolved to excel in sweltering conditions--and how we've lost touch with this ancient advantage. He plunges into the steamy world of Finnish saunas, serves as a test subject in cutting-edge heat labs, and tackles a grueling 100-mile bike ride under the blazing Texas sun--to show how temperature extremes can expand our physical and mental limits. He even explores how infrared sauna therapy may fight depression more effectively than medication--and how many people are rediscovering the power of communal wellness through the use of social sauna.

Whether you're looking to perform better, extend your healthy lifespan, adapt to a warming planet, or tap into the human connection that forms when we sweat together, Gifford reveals the incredible benefits of reawakening your body's natural adaptability to heat and cold. You'll discover how sweat is more than a cooling mechanism; it's central to peak performance. We were born to sweat, and sweating makes us stronger.

Hotwired shows how short-term discomfort transforms into long-term power. It's a thrilling call to reimagine heat--not as a threat, but as a tool for survival and strength.

Review Quotes

"A splendid book...Gifford has exceptional skills as a reporter and storyteller, and he deploys them here to deliver a perspective that may change the way readers think about the otherwise unpleasant condition of feeling damp on a warm day." - Wall Street Journal

"Hotwired is revelatory, a fascinating exploration of heat as a fundamental pillar of health. With scientific rigor and narrative grace, Gifford illuminates how thermal stress activates our deepest biological pathways toward resilience, metabolic optimization, and authentic longevity. This is essential reading for anyone committed to understanding the potential transformative alchemy of their own physiology." - Sara Szal, MD, New York Times bestselling author of The Hormone Cure and Women Food and Hormones

Fascinating. Gifford shows--through science and sweat--that heat isn't the enemy. It's a superpower we've forgotten how to use. - James Nestor, New York Times Bestselling Author of Breathe

"Gifford skillfully navigates the many strands of aging research to create an entertaining narrative of the perils of getting old." - Kirkus Reviews

"Hotwired is a gripping investigation into the power of heat and how it shaped our evolution and can still transform our physical and mental health today. Bill Gifford makes the science come alive, reminding us that the path to a stronger body and mind often runs straight through discomfort." - Michael Easter, New York Times bestselling author of The Comfort Crisis and Scarcity Brain

"Read this book! Hotwired is a masterpiece of story-driven science that unpacks that health benefits of heat, and ultimately reveals how sweating together can not only make us healthier, but happier and more connected." - Dan Buettner, National Geographic Fellow, New York Times bestseller and founder of the Blue Zones