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 ...

Box jumps: Pick a stable surface that you can jump onto and land safely (use a step, bench in the gym, low wall outside, etc). Start in a squat and jump from both feet to land on both feet in a squat ...