A captivating blend of reportage and personal narrative that explores the untold history of women’s exercise culture--from jogging and Jazzercise to Jane Fonda--and how women have parlayed physical strength into other forms of power.For American women today, working out is as accepted as it is expected, fueling a multibillion-dollar fitness industrial complex. But it wasn’t always this way. For much of the twentieth century, sweating was considered unladylike and girls grew u