Seven years ago, when I first entered the world of marathons, I joined a group of runners who, on our very first long run, let me know the chaos that training for 26.2 miles would bring. Being the ...

A few weeks before her first marathon, Kristel Crame bought a trendy purple polish to cover her toenails, one of which she'd bruised on a long training run. Subscribe to read this story ad-free Get ...

If you're a runner, you know that black toenails are common—but that doesn't mean you have to put up with them. Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a ...

Mark Gurarie is a writer covering health topics, technology, music, books, and culture. He also teaches health science and research writing at George Washington University's School of Medical and ...