They all need straightening a bit and possibly sharpening too. I like the middle one best as you've captured a nice expression of determination and also the action of hurdling.
What would be really cool is to get down much lower. A very attractive receeding rectangle could be made from looking through the hurdles, and then snap the shutter as the athletes jump over.
So he's to get down in the middle of the track, line a shot up through the hurdles, then take the shot and get out of the way within the 15 seconds or so it takes to run the race, I doubt it could be done and know the officials would not let you do it.