uhm
with my knee (atm) , i have a bad pain about 20 minutes of freestyle.. when i stretch it, the pain is soo worse man
and with my ankle, it just hurts about some hours of freestyle.. just when i land a tatw or something..
sorry for bad english
with the knee you might have ossgudschlatter problem...
I had the same basicaly when I was growing... you may will notice that you have like a little "egg" in your knee, maybe now or later it depends.... but if its that its the fucking worse thing, I had it for 2 and 1/2 years more or less, you loose alot of muscle mass in that leg because inconsciously you will use less the injured knee, somtimes u dont feel pain, but when u do physical activity you will start to feel it, and when u strech it while it hurts its even worse, It fucking hurts......its very common so dont worry about that....
anyways that is just my theory, I havent seen your knee so I cant see what u have with prescicion... so my best advice now is join a doctor
:cheers: