My twelve cents..
I never competed in MMA. The first UFC didn't come around until I was in my forties. Even though Jorge Rivera tried to get me to fight in one of his events in Puerto Rico when in my fifties, my wife wouldn't let me. [yes, I'm pussy whipped] But I sure wish I had, if for no other reason than the fun of it and to have the right frame of reference when discussing all kinds of competitions. Even though I was an MMA judge for years in New England, judging guys like Kenny Florian and Joe Lauzon in the early part of their careers - watching and judging sure ain't doing.
Anyway...for tournament style competitions, where you fight a guy and if you win you fight another guy - until the division has one winner, there's really, in MY OPINION, little self defense going on in your head. You aren't trying to hurt the guy, or knock him out, you're just trying to beat him. To me, the very hardest part of tournament competitions has always been driving hours to the tourney and waiting what seems like eons to hear your damn name called. Sometimes, when you're ahead, you stall. I mean, he's losing, he
has to come to you, and the clock is ticking. Ticking in your favor. You really don't stall much in self defense, unless you're waiting for the cops or other factors that might save your butt .
In ring fighting, while you may very well be trying to kayo him, maybe even hurt him a little, it's still different. I kick boxed professionally for some years in New England, and when Massachusetts outlawed kick boxing for a while, yes, that's correct, it was against the law to have kick boxing in Massachusetts. In case you're wondering why - kick boxing shows were outselling boxing shows by a big margin, HUGE margin. The State House in Boston Massachusetts had a lot of old time boxers working there in FAT political jobs - they pushed a bill through declaring that since kicking was considered "dirty fighting" they banned all kick boxing in the state. So, F em', we went to other states and fought.
Interesting side note - years later, these same son's O bitches in the State House - I ended up training them how to judge MMA matches in Mass. Weird how life comes full circle some time.
Anyway...if you're kickboxing, you are aware of all rules, how many kicks you are required to throw or lose the round and/or the fight. You are aware of where you are in regard to where the judges sit, you are aware if you finish the round strong, the judges might give you the round even if you didn't deserve it. So many things come into professional fighting your attitude, movement, focus - is as far from self defense as Washington D.C is from honesty.
Competition gets easier the more you do it. Those first couple of times you are as nervous as a cat. Then it becomes something you just waste a perfectly good Saturday on because it's fun. And sometimes there's money!
And I was always taught that training should be much harder than any competition, or any self defense situation, you
ever get into. That's the way we always approached it. Seems to work. Ain't nobody died yet.
And the only advice I'd give to guys going to tourneys....bring a lot of sandwiches. You're going to need them.