is kicking on the ground and flying kicks legal in UFC?

[Tom]

1) the ufc rules only say that u can't kick or stomp a grounded opponent in the head. the rule didn't say that u can't kick the body. so why aren't the fighters doing it? i only see them run up and try to grab the head or whatever. to me, kicking a fallen opponent would be more effective don't u think?
2) also, are flying kicks legal? i don't see ne fighter does it. i would do it if i was fighting. it's effective at the beginning of the fight just to run as fast as you can and with all your weight kick the opponent.
3) what's up with grounded opponent not using their legs when they're grabbling? is that illegal? all i see in ufc is the legs always limb as cummed peenis. you can't kick but surely you can use them to push off the opponent can't you? like when they're caught in a leg lock. what's the other leg doing? why aren't they using it to push off? and why are they always using half guards and wrap legs around the opponent on top? why don't they get both legs on top opponent's stomach and push off? i'm sure they'd be flying.
4) If all these things are legal then i think personally, all the fighters are stupid for not doing any of these things.

 

[Unregistered]

good point

pushing off from the bottom could easily result i giving your opponent side control or an easy pass.

fighters who are trained in BJJ will hold guard or spider guard (heels on hips) to try and take advantage of a mistake and pull off a submission from the bottom

fighters who are weak in BJJ are trained to stay safe. which is hug the head and lock the guard. Hope the ref stands you up.

I agree that there are many martial atrs kicks like spinning back kicks that are devastating finishing moves. Fighters just seem to avoid them because one mistake and they will get taken down in a bad spot.

I would do it if I fought though!!