HIIT workout founded by a Japanese Olympic coach that uses periods of intense exercise and rest to burn calories.

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 ...

The no-equipment workout you need to keep everything, er, moving includes rapid-fire reps of squats, plank jacks, knee drives, and skaters. The holidays might be the most wonderful time of the year, ...

You've likely heard all about the benefits of exercise for your heart, lungs and blood sugar. Basically, it does the whole body—and mind (thanks, endorphins!) good. However, you may have stopped using ...