I use a physics-based model to search for general gait patterns in recreational runners. When the model indicates a possible pattern, I look for confirmation in published research.
So far the system has revealed three patterns which I have found in the literature: StepFrequency versus Leglegth, Mass Specific Power versus Velocity and a minimum in MSP, as reflected in VO2 consumption, at a runner's Preferred Step Frequency (PSF).
Now I am looking for research that might indicate a correlation between added mass, such as a back pack or a weighted waist belt, and step frequency (SF). If you or if you know of any group that may have done work on this topic, I would appreciate a reference.
Ted Andresen