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. Sprint interval ...

If you want to become a fitter and faster runner, especially if you have a target race in mind, the best thing that you can do is select and follow a structured training plan that aligns with your ...

It seems like there’s always a new workout trend sweeping the internet. First it was the 12-3-30 treadmill routine, then my social feeds started getting flooded with reformer pilates videos, and now ...