crunch

  • Are Sit-Ups Actually Bad for Your Back?

    Are Sit-Ups Actually Bad for Your Back?

    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…