With the Stakt Mat, I never need to compromise — its foldable design lets me customize how I use it depending on the exercise. For example, when I’m on my back for crunches or bicycles ...

helping increase engagement and range of motion compared with some other crunch variations. You can do the exercise just about anywhere, although I recommend one of the best yoga mats for your ...

In our Lab tests: Interlocking exercise mat tiles may be just what you need ... and protection from outdoor elements when doing crunches or other core work." Our testers love this pick's ...

Build strong core muscles without weights, just using these three crunch variations from a functional training coach.