Please don't pre-zoom your art, the forums have their own zoom feature. 1x art is easier to view at different scales and easier to edit.
I like the timing of the run, but feel that such a long floating period might look better if the high point of the run was a pixel higher or something.
I don't recommend leaving the arms out entirely when drafting. The arms make it easier to see which way the torso should rotate during a run. Without the torso rotating, a run looks stiff even if the legs are beautifully animated. Animate the whole body, perhaps using colour-coded, solid-coloured shapes representing each limb. Shade and add details after.
The bottom of the red scarf disappears in some frames.
