su ##zuki continued to lead karate classes despite passing age of 80 . The great - grandmother of 17 only took up the sport when she was 15 . After winning black belt at 16 , set up a karate class for disabled children .
Helen Dugan continues to lead karate classes despite passing age of 80 . The great-grandmother of 17 only took up the sport when she was 47 . After earning black belt at 61 , set up a karate class for disabled children .