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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 ...

SIT-UPS are one of those exercises that refuse to die. They’ve been praised, blamed, cancelled, revived and still show up in boot camps, military tests, and random living room workouts everywhere. So ...