Ow!! Thank you for the help :D i'll try to improve it! :) i'll ask for your help again in the future :D

Oh thanks for the critique! :D (just in case... I'm not good at english :D and i'm easy to misunderstand, if by any chance my words are a bit rude or anything i'm sorry, i don't mean anything)

I got this website as my inspiration http://www.yarrninja.com/pixeltutorial/chapter15.htm a street fighter animation. I really like the way they run specially sakura... I think it's fine the way it is without moving the head since it's a normal run with a set goal. so moving only the body slightly is fine (this is what I did), but i think a run that it feels like you are running for your life or running with all your might might be the right feeling for the run that you are suggesting... but i'll try to research for more and maybe i'll find what you really meant and make my animation more better! thank you for the critique!! really I'll look forward for more of your critiques in the future :D