m a healthy 17 year-old boy, but I have a problem when i excercise where my left leg locks up at the knee, my
foot turns
outward and tilts slightly towards the ground. However
when I sit down it stops after about five minutes, but if i resume activity it will return quickly. This happens most commonly when i play tennis, but it also occurs when I run. This has been happening for about a year and a half, and I've been to several doctors with virtually nothing to show for answers.