Are Sit-Ups Actually Bad for Your Back?
by Beth Skwarecki from Lifehacker on (#5ZZJX)
If you've ever trained for a military fitness test or been made to do the presidential fitness test in gym class, you know the sit-up. Somebody holds down your feet, and you sit up as many times as you can before the test is over. But then again, you may have also heard that sit-ups are bad for your back, and that all...