Neuroscientists at the University of Oxford have studied 48 healthy young adults who couldn't juggle to see how the practice of juggling challenges and changes the white matter in the brain.
Half of the participants were involved in a six week training course to help them learn to juggle and were also encouraged to train 30 minutes a day. FMRI scans were taken before and after they'd learned to juggle.
The group that had learned to juggle showed significant changes in white matter, which are the long nerve fibres that carry signals between nerve cells and also connect up the various areas of the brain.