Hi Ted
I wondered if you had looked at this thread on the site and if so what you thought of the ideas -

Ground reaction forces and gait

I wonder if shortening the effective arm length during gait would increase step frequency -just a hunch . With regard to your first post ,would holding weights reduce arm swing amplitude compared to a non weight holding set up .

I don't have the expertise or equipment to look the idea of pelvic acceleration feeding energy into the bodies pendulums (arms legs ) to produce body segment co-ordination but if you did it could be interesting .