Add Yahoo as a preferred source to see more of our stories on Google. Experts on why it's so hard to get six-pack abs, particularly for women, and why it's not the only sign of a strong core. (Photo: ...

Many people start going to the gym in the hopes of achieving what has long been seen as the holy grail of health and fitness: six-pack abdominal muscles (abs). But as many people who have tried will ...

Toned abs — but in particular the infamous six-pack — are often seen as the Holy Grail of fitness. Experts say they're not only much harder to achieve than many people realize but some caution that ...