Add Yahoo as a preferred source to see more of our stories on Google. Mirna Valerio is an ultramarathoner who runs the "Fat Girl Running" blog. She wants people to know that anyone can be a runner.

Interval running condenses the powerful effects of regular running into shorter, high-intensity bursts. Research shows it can improve cardiovascular health, regulate blood sugar, and reduce body fat ...

The viral 12-3-30 workout possesses all the hallmarks of a typical TikTok fitness trend: a self-descriptive name, an easy-to-remember hashtag, and the promise of an easier way to burn fat—in this case ...