When practicing juggling, one is reinforcing the development of neuron paths associated with a given trick. There are many factors that contribute to this system. Body agility, strength and stamina as well as natural ability to acquire certain types of skills influence the learning process greatly. Most of us are well aware of these elements. But there are aspects that tend to be overlooked.
Instinctive reactions occur without conscience thought.
Blocking an errant throw or dodging a honking car require reaction times that exceed the speed of analysis. The key to juggling is to teach the body new instincts. The mind interferes. Only through repetitive practice does one begin to break down this barrier. This is no simple task, for this interference occurs on different levels.