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. While plenty of ...

Simple, equipment-free routines for beginners to build strength, flexibility and heart health at home, with safety tips and progress tracking.

While there's nothing quite like running outdoors, there are a few things to be said for a good treadmill workout: you can control your speed with precision, step off whenever you need a break, and ...