In an ambient room, tranquility fills the air. Candles are lit and relaxing music or a favorite TV show plays in the background while calories are burned on a treadmill all without having to leave ...

I don’t think that’s inherently a bad thing. Switching up your workouts is, in its own way, an avenue for keeping exercise doable, healthy, and fun. At the same time, it would be nice to have more ...

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. So where should you ...