OK guys basically Ive been trying to get back into the swing of long distance running, (i want to run a mini marathon) and i went hard for my first week, about 12 miles in all over the week with one day of 100 yard dash sprint up hill.Every time i get home and relax the outside of my knee acts up, really sore on the left side of my knee (left leg). Needless to say stares were a bitch all week mostly going down them. it was still sore on my day off but the day after i could run on it no problem, but when i finished it would come back. So today a was around mile 3.5 at a really good pace and my knee was feeling a little weak but my condition with everything else was great. i wanted to push for more but going up a small hill my knee gave out, almost like a dead leg (like some one kicked me right behind my knee. i do it to people all the time as a joke.) But that bitch collapsed and i popped right back up and kept going but i could feel it getting weaker with each stride. so i walked back home with no pain. I have had this pain from jump rope before. i need to know how to prevent this because the groove I'm in is really good and i cant afford to take it down a notch.