Credit: Shutterstock I’m a marathon runner and a fitness editor, so I know that, when it comes to getting across the finish line, a strong core is as important as strong legs. I’ve already shared my ...

Thanks to our new, 20-second hand-washing practices, our hands got a lot of attention this year. But while most of us know how important it is to keep them clean (cough, cough: very), you may not ...

It is what the fitness enthusiasts call a muscle pump. This temporary swelling happens when blood rushes into the working ...