Megan Roup, who's been the trainer to Dakota Johnson, Miranda Kerr, Molly Sims, Elsa Hosk and Whitney Port, has developed a series of exercises that can be done in under 10 minutes. (Photo: Courtesy ...

For many people, dance feels more like play than exercise, which helps to explain its enduring appeal as a workout. What began as “aerobic dancing” in the 1970s has evolved with exercise science (and ...