The cardio craze has ebbed and flowed for decades. At various points in time, it’s felt like everyone is obsessed with cardio-based workouts—and doing a lot of them—from step aerobics in the ’80s to ...

Korir’s moves, choreographed to music, demonstrated his ability to move with precision and rhythm – and watching these videos left us asking two questions. Why is step aerobics important to Korir, who ...