Add Yahoo as a preferred source to see more of our stories on Google. Let’s be clear: there are a ton of ways to “get in shape for summer,” whatever the hell that even means. Runners are in shape.

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. This is going to get ...

The fastest sprinter is the world right now is Lamont Marcell Jacobs, who won Olympic gold in the men’s 100-metre sprint with a time of 9.80 seconds. You might be surprised to learn that most of the ...

Muscle knots are highly irritated muscle fibers that have tightened into a ball in one area of your muscle. These painful, tender spots can feel sore and often occur in your upper back, shoulders, or ...