Originally Posted by scuba steve

so i could go to workout.com and ask there, but i'd rather see what the masses have to say here

i'm doing this in a couple months, toughmudder.com. i did some smaller ones similar to that this summer, the last one being a 10k one. that one kicked my ass but i was totally unprepared for it. so i've started running more so i can be able to handle the 12 miles. i was talking to someone today cause my knee suddenly hurt out of nowhere last night 1.5 miles in, but i don't think its anything serious. they were telling me i'm stretching improperly. so any long distance running stretches i should be doing? i'm not finding anything that stands out to me anywhere really that i'm not doing