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.

The six-pack has long been #goals when it comes to abs—not just because it practically guarantees your have a super-strong core, but because it’s visual proof of that fact. But if you look at some of ...