powerlessnes in a dream?

in some of my dreams i try to run but either i go slow or cant run at all. any ideas on how to get past this

Recently, I found that seeing someone else run helps me run, I don't know why. That was only once though.

There are some other ways to get past this problem:
-taking long strides
-running on all fours
-running backwards...

To name a few.

I would love to say that this is some sort of bias that has popped up, but I think it has more to do with our physical bodies being paralysed and whatnot, because this also happens in non-lucids.

thanks sean999. this seems to only happen to me when im trying to run fast on two legs.when i run on all fours i have no trouble.