This week on Under the Radar with Callie Crossley:

Few would argue that the multibillion-dollar fitness industry is driven by millions of American women who regularly run, box, climb, swim, cycle or otherwise sweat their way to good health and strength. But most of us would be surprised to know that daily exercise for women was a major cultural shift in the 20th century. Or that it took the persistence of several pioneering women to make it happen. Author Danielle Friedman shares their stories in her book, “Let’s Get Physical: How Women Discovered Exercise and Reshaped the World.”

It’s our March selection for “Bookmarked: The Under the Radar Book Club.”

Guest: