I've seen the situation you described with a purple belt in her thirties rolling with green belt that looked to be 13 (couldn't have been older than 15 because of the kiddie belt). Edit: And the surreal thing is that BJJ is probably the one grappling art that depends less on sheer physical power. The performance difference must be even greater in sports like wrestling for example.

I've seen the situation you described with a purple belt in her thirties rolling with green belt that looked to be 13 (couldn't have been older than 15 because of the kiddie belt).