Back in the day, sit-ups were the exercise of choice to train the core. We didn’t use the term “core” back then, but if you wanted the kind of abs displayed in Calvin Klein underwear ads, sit-ups were ...

In the second installment of our six-part core lab, Tonal Instructors Dr. Liz Letchford & Coach Paul Wright guide you through a workout to maximize your rotation. This conditioning workout consists of ...

Hitting that end-of-January motivation slump—or just want to spice up your routine with fresh moves? Meet the quick-yet-intense dumbbell workout that will jolt you and your body back to life. This ...

You’ve probably seen it all over your feeds: Fitness pros and physical therapists talking about “training the deep core.” But unlike crunches or Russian twists, these exercises don’t come with a pump ...

Lately, my core routine has felt staler than week-old sourdough bread. Sure, classic moves like crunches, Russian twists, and planks are great (and effective!), but in order to reap the gains of ...