Defined, toned abs — commonly called a six-pack — are an often sought-after goal in the gym. But not all toned abs look the same. Some people sport a four-pack, while others may have an eight-pack.

As you struggle through your third set of crunches at the gym, one motivator might be the promise of six-pack abs. But for some people, this may not be physically possible — not because they aren't ...

The number of washboard abs you can show is determined by your DNA, according to research. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.