Ok, didn't really know where to put this but training and fitness kinda works with it right?

Anyway, I was wondering. I'm a big fan of meditation and do it quite alot (more than the average teen anyway I'm pretty sure ), and I can reach a pretty good level of relaxation. However, when I exit meditation after a long session I usually find that my feet and sometimes my calfs have fallen asleep. I just went through a meditation session and I could hardly even walk afterwards, kept sort of stumbling into a half crouch. So, my question is, is there something I'm doing wrong or is this just something I'll have to deal with?