It used to kill me when I first started, I'd be sore for days xD
Now i'm just so used to it, you wouldn't believe the muscle I have in my thighs lol.
I've always got something wrong with my legs though, seriously always. I'm sporting a sprained ankle currently but it's a lot better now. I'm a tough kid, I don't complain unless I can see the bone sticking out xD Seriously I ripped my leg on barbed wire once and was just sat there with all this blood coming through my jods like yeh yeh i'm fine (however when it comes to cleaning things up, i'd rather get infections thanks xD)