Because it is the whole body strength conduction; When you wave the battle rope, the direction, rhythm, mode and waveform are different during the shaking process; Centrifugal force will cause instability. In order to keep your body stable, the functions of all parts of your body will react with each other.
For example, the human body itself is a "small rope" (power chain). When the "small rope" and the "big rope" are connected together, if the "big rope" starts to shake, the small rope can only fight with force if it can't move.
In fact, rope throwing training can be regarded as a kind of training of core stability and explosive force. If you know anything about MMA, you should know the fighter anderson silva (Spider-Man). If you pay attention to his fighting movements, you will find that his movements are very small, but his fists are very explosive. In fact, this requires a quality, that is, the ability to transmit power to far places with short power, and it is this quality that can be cultivated by throwing ropes.