Before going for doubles, master singles
Mastering the technique in Crossfit ® is perhaps the most difficult and tedious but we should not stress ourselves with double jumps, let's first master the simple ones.
Take your mobile and record yourself from the side: 20 simple jumps looking at your feet; from the front looking at the arms and 20 simple jumps enjoying and relaxed, with the body active but without tension.
The shorter the rope, the more difficult and faster the double jump will be. The experienced athlete will have to fit the rope to fit the nipples and the beginner slightly above the nipples.