A couple of glaring weaknesses, especially if this model is to find an application either you need to assess superiority over current models or make refinements to current models and I didn’t find this to be true. It’s not that I could have done better, I have been trying for 3 or 4 years now to do what you just did and obviously I haven’t come close. I am still collecting papers and having trouble expressing the thoughts into written words.
You have 3 Mero and Komi references which are not balanced by the majority of research papers in existence regarding Newtonian physics aka Classical Mechanics and sprinting.
No James Hay references, Hay has a great review article discussing step length and stride rate of acceleration. You did reference an article of his understudies I believe.
No Blickhahn, Farley, Hegland, Taylor, or McMahon references, you did reference Weyand, but even Weyand’s work has plenty of background from the aforementioned authors of what I would term as necessary and classical references concerning classical mechanics, modeling, and sprinting. If you are going to reference Weyand then you need to reference one of these giants as they are the link from Cavagna and Alexander to Weyand.
In no way does this invalidate your article, but I believe to apply your model to sprinting you need to show greater account of the existing models which describe movement already and not just the originators of said of models.
lastly, application of the model to other data, Coh’s subject and Johnson’s 1987 WR or Greene’s 1999 WR is fine, but apply the model to other existing sets of data and provide how well the model fits and if it doesn’t fit some data from differing data sets where does it fall apart. I would have tried to fit it to as much data as humanly possible.
Overall its a great paper and provides a ton of insight, the Di Prampero and Hunter references are something I liked seeing.