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Looking for gait parameter data around Preferred Step Frequency

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  • Looking for gait parameter data around Preferred Step Frequency

    Hello All,

    To investigate how a runner selects their Preferred Step Frequency (PSF) to
    minimize their Cost of Transport (COT) or O2 consumption I developed a
    swing-leg model that feeds off my spring-mass model. The sub-model does not use
    inverse dynamics or the “driven oscillator” approach. The model shows a minimum
    in the COT at the PSF similar to that offered by Cavanagh, et al (1). I
    would like to compare the gait parameters from this double model with real-world
    data, but I can't find any research on how they change around the PSF.

    Does anyone have any treadmill results that indicate how the contact time,
    GRF, CM Displacement or mid-stance knee velocity behave when a constant-speed
    runner changes their step frequency by +/-15 to 20% from the PSF?

    Are there any studies that have examined the gait parameter changes around
    the PSF? Any citations would be appreciated.

    Thank you all,

    Ted Andresen
    Mathematics Dept. (SP/G)
    St. Petersburg College
    Hot & Humid, Florida

    (1) Cavanagh PR & Williams KR, The effect of stride length variation on
    oxygen uptake during distance running. Med Sci Sports Exerc. 1982;14(1):30-5




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