This cardio movement tests a number of the key CrossFit fitness definitions: Agility, co-ordination, accuracy, balance, endurance, stamina. Even strength and power can be related to this movement in the calf muscles.
"When double-unders fall apart, it’s painful to watch—and experience. The rope whips the athlete in the legs. The rope catches under the athlete’s feet. The hands and body seem to move at cross purposes. The athlete gets increas- ingly frustrated, and the situation gets worse. The scenario usually ends with a rope getting thrown across the gym. Often, there are tears."
In 15 mins I took Matt from struggling to get a couple consistently to stringing sets of 5+ using drills involving singles/DU combo's.
GET BOOKED IN FOR A PT IF YOU'D LIKE TO MASTER THIS MOVEMENT FOR YOUR CROSSFIT DEVELOPMENT!