Originally Posted by Tom Yum

Kyokushin and Seidokan Karate produce some mean fighters. I don't know if this is true or not, but I heard that the kyokushin black belt test involves the infamous 100-man sparring session. I guess you pass if you are able to take a beating after you've gassed...

Not 100 all at once, but consecutively. That's 100 rounds. Even the bare knuckle boxers of olden days never fought past 50 rounds, if I'm not mistaken.