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 ...

Step aerobics is a classic cardio workout. It has lasted for decades for a simple reason: it delivers results. The "step" is a 4-inch to 12-inch raised platform. You step up, around, and down from the ...