Exercise is our modern obsession, and we have the fancy workout gear and fads to prove it. Exercise - a form of physical activity distinct from sports, play, or athletics - was an ancient obsession, too, but as a chapter in human history, it's been largely overlooked. In Sweat, Bill Hayes runs, jogs, swims, spins, walks, bikes, boxes, lifts, sweats, and downward-dogs his way through the origins of different forms of exercise, chronicling how they have evolved over time, and dissecting the dynamics of human movement. Hippocrates, Plato, Galen, Susan B. Anthony, Jack LaLanne, and Jane Fonda, among many others, make appearances in Sweat, but chief among the historical figures is Girolamo Mercuriale, a Renaissance-era Italian physician who aimed singlehandedly to revive the ancient Greek “art of exercising” through his 1569 book De arte gymnastica. In the pages of Sweat, Mercuriale and his illustrated treatise are vividly brought back to life. asHayes ties his own personal experience to the cultural and scientific history of exercise, from ancient times to the present day, he gives us a new way to understand its place in our lives in the 21st century.