Abdominal exercises not only give you a leaner midsection, but they strengthen
your back, too. Which ones should you try? In this slideshow, you'll learn
3 simplebut keyexercises for a strong core and a healthy back.
Get your doctor's okay before you try any of these core moves. And pay attention
to how you feel when doing them; if you have pain or new symptoms, stop and
call your doctor.