Most of the videos offer an easy formula using numbers. For example, in one video, a TikTok user said "the ultimate summer ...

As someone who lives in a walk-up apartment, the act of climbing stairs feels much more like a daily chore than an exercise I’d willingly do in my free time. But between the viral 25-7-2 StairMaster ...

But a stair climber isn't necessarily a good option for beginners. "If the most you're doing is a walk around the neighborhood, it feels like a big jump to a half an hour on the StairMaster ...