It is, as everyone knows, really quite hard to get the type of six-pack you see on fitness models, and even harder to maintain it. It is, however, far easier to get a four-pack. If you regularly ...

It’s a common fitness dilemma: You’re banging out crunches and planks week after week but still not seeing the strength and muscle tone you want in your lower abs. That’s a sign it’s time to switch up ...