Why is the 9th round such a keystone round in boxing? besides posting a bunch of fights that ended in the 9th, i will also point out the fact (seeming fact anyway) that a LOT of predictions are for TKO 9th round.
People start to gas? Non-contender level fights cap out at eight rounds, so the stamina of most fighters without championship or contention/eliminator experience of some sort isn't going to stretch much further? :think
Could well be that - a physical limitation that the body normally has or something. But so widespread? Maybe there is a second wind, endorphins, that kick in after about 1/2 an hour of physicality, like a long distance run getting a lot smoother after running for a half hour? Interesting that you also mention that 8 rounds is the usual fight for non-contender fights, maybe the 9th is where a ot of boxers have not fought a lot of fights.
I think it's because the gas tank starts to run a little empty at around the 8th-9th round. That's when the sloppiness comes into play with fighters. You see a lot of winging arm punches, open angles and all that which allows the action to pick up and the fighter with the better technique and endurance to take over.
