Onto the great staples of animation - cycles. Walk cycles and run cycles. Gonna have to use them forever, so might as well get a good head start learning these bad boys.
Walk cycle - voila!
Oh, and I can't forget the run cycle - that's where all the fun is.
And before I forget - I kinda like how these came out, so i'll share em with the world. And I present to you, world, MUSCLES of the torso. Ooooh. Ahhhh.