Controlling animation rotation and translation

Hey guys,

So, I've gotten the package with the CMU mocap files converted to fbx, loaded a couple of them (run and walk) in blender and trimmed them to what I needed, removed the translation on the hip bone so it would stay still, but when I run the animation in a loop, it still applies some translation and rotation to my object.

Any ideas on how I could prevent that, or another way to do it that I'm not familiar with?
It seems like if I want to make a basic character controller to walk and run around , running the animation constantly will eventually move and rotate the character in ways I do not want to.