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 ...

This workout is short — just 10 minutes — and requires no equipment. But it packs in a lot of work. PS Fit instructor Natalie White designed it to target your abs, core, and thighs, and she'll have ...

While classic core exercises like sit-ups and crunches are certainly an effective way to train your abs, they are not the only way. If you prefer to stay standing for your workouts, then this ...