Better abs, no back pain
■ We sit too much—at our desks, in our cars, in front of the TV. And when we train our abs, we reinforce that posture with situps and crunches that contribute to tight hips and a rounded lower back. Over time, this can lead to lower-back pain and even conditions like a bulging or herniated disk. But you want abs, dammit, so you’ll take your chances, right? You don’t have to choose vanity at the cost of health, or vice
