Pain When I Slide

I’m 13 and not in high shool yet so I have to hit and run the bases because, well you know, the coaches dont let you have one position. I’m a pretty decent hitter, so I get on base alot. This also means, as you guys know, that I end up having to slide alot. So everytime I slide either my knees or ankles start to hurt me. This completly sucks because this prevents me from doing my running. I do a regular figure four slide and its not like I slide incorrectly. Is there anything I can do to strengthen these tendons so these injuries wont happen?

its going to hurt somewhat when sliding, but all that should happen when doing it correctly is some skinning on your thigh. it is a possiblity that your sliding a weird way.