I don't believe that sit-ups or crunches are must-haves in any core routine. In fact, I steer away from them in favor of other functional core exercises that build a strong midsection, and this "core ...

Workouts No planks or sit-ups: This 5-minute Pilates routine targets your deep core to build strength and stability Workouts Forget planks: This one move transformed my core strength (and it’s not sit ...