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 ...

Q. One of my favorite group exercise classes used to be step aerobics, but over time it began to bother my knees. My gym just started offering these classes again, but I’m worried about hurting my ...