Crossing The Jump Rope: Use The Arms

For regular rope skipping, it is preferred to generate rope speed by turning only the wrists, and refraining from involving the arms. 

When you move to crossing the jump rope, it is exactly the opposite. If you are still expending effort trying to turn your wrists as you cross back and forth, your crosses will be too slow, and eventually the rope speed will get out of synch with your foot speed.

Watch this video...