Then let's remind you of a few things, right : D?

What you've got now is more a compilation of poses that occur in a run. But at times it almost goes backwards. I put a little thing under his feet to show how the ground travels under him while he runs, as if he was on a conveyor belt. As you see his feet never follow the ground below him.

So this would be a way to start off a run. To make a foot that follows his movement over the ground and look good run-wise

after that you can add another foot and some bounce and voila, that's a lot of runningness right there.
If you've got any questions regarding this edit, just go ahead and ask!