Every Jump Rope I used did NOT work until a Crossfitting Friend showed me why & how to do my Double Unders as RX'd. It’s no secret that most Crossfitters start out borrowing jump ropes from their gyms… ...very few people know that owning their own jump rope from the very beginning can DRASTICALLY affect their Double Unders. What if I told you that a custom rope length, used consistently, is the Number One factor in doing your Double Unders as Rx’d? Because as important as factors like Coordinati