‘No proof’ Ali’s Parkinson’s is linked to boxing

Muhammad Ali’s personal doctor has revealed he cannot be sure that boxing contributed to the former heavyweight world champion’s Parkinson’s Disease.

Ali, considered by many to be the greatest boxer of all time, has suffered with the neurological syndrome since the mid-1980s and it has often been presumed that blows to the head during his 21-year professional career were a contributing factor to his condition.

But Dr Abraham Lieberman, who is the medical director of the Muhammad Ali Parkinson Centre, admits that it was not possible to be entirely sure what caused Ali to suffer from Parkinson’s.