Carley is a writer, editor and social media professional. Before starting at Forbes Health, she wrote for Sleepopolis and interned at PBS and Nickelodeon. She's a certified sleep science coach and ...

It's no secret we love trying out a fitness challenge at Women's Health. There is the 12-3-30, the 25-7-2, the walking challenge and the formidable (or quite frankly terrifying) 75 Hard Challenge.

The authors do not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and have disclosed no relevant affiliations beyond their ...