Among the myriad of cardio exercises available, running and jumping rope stand out as the most common and accessible choices. While some people enjoy the freedom and fresh air of running outdoors ...

and turn the rope as fast as you can. But to pull this off, you need an exceptional ability to stay in the air mid-jump, or what’s known as hang time. Moriguchi turned to Japanese shoemaker ...

the goal is to swing the rope in two full rotations under your feet before landing. This means that your jump has to be somewhat high to give you the air time to swing the rope around twice.

Meet the cardio tool that athletes and fitness newbies alike are loving: The Benvo Weighted Ropeless Jump Rope. This little device already has over 3,500 five-star fans, and it's just $13.