If you complete 100 abdominal crunches a day, you might build a little muscle, but more likely, you’ll be left with sore muscles and not much else. The crunch and its relative, the sit-up, can each ...

The First 2 Moves Trainers Teach Clients Who Want a Stronger Core originally appeared on Parade. Most of us have dreamed about having a strong, sculpted core—maybe even six-pack abs?—at one point or ...