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 ...

Working on your upper body strength doesn’t have to start and end with a swanky gym membership or rows (upon rows) of weights. In fact, the best 10-minute arm workouts, which can be done at home (or ...