"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." I love working out, and a good workout challenge is even better. When I had the opportunity to try model ...

Alexis Ren is a model, dancer, and wellness entrepreneur, so when I stumbled upon her 10-minute ab workout on YouTube, I knew what I was going be doing the next day. In the video description, Ren said ...

What can I say? I love the feeling of strengthening my muscles on a Megaformer machine, working them in 50 minutes worth of planks and lunges until my core, legs, and butt are shaking. It’s the only ...

Gale started with crunches to strengthen her core. She then opted for arm and leg raises to further the burn. Gale also relied on knee-to-elbow crunches and twists. Her workout buddy relaxed and ...

As a personal trainer, I’ve always been curious about how models stay in such incredible shape. What do they eat? How do they train? And surely, they secretly hate burpees too, right? It’s not that I ...

The fun thing about ab workouts is that there's so much you can do to challenge and strengthen your core with zero equipment necessary. Take this 10-minute workout shared by Swedish Australian ...

Sports Illustrated swimsuit model Leticia “Tish” Martinez flaunted her enviable six-pack in ab-baring workout gear, even on her “rest day.” The trainer and bikini model is a bona fide fitness and ...