Stunning ‘Sports Illustrated’ swimsuit model and fitness guru Leticia “Tish” Martinez lifts up her workout sweatshirt to show off her famously chiseled, pro sports-worthy abs.

"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 ...

The bodyweight moves packed a punch.

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 ...

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 ...