I've been using the definition: "Of, relating to, or being a style of art in which natural objects are not represented realistically." With this in mind, it really doesn't fit abstract, IMO.
Abstract concept, but a little too subtle for me. The photo as a whole loses the abstract notion more, and while we see that there was a progression of your model, the 'movement' isn't noticeable so much, and therefore the motion aspect is also slim.
Overall it's a good photo, but I think it could have been better. Maybe have the person run down the stairs or use a longer shutter speed and have the person pause on each step, just my thoughts.