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Transfer function between tibial acceleration and ground reaction force

M A Lafortune1, M J Lake, E Hennig

  • 1School of Human Biology, University of Guelph, Ontario, Canada.

Journal of Biomechanics
|January 1, 1995
PubMed
Summary
This summary is machine-generated.

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This study reveals a consistent relationship between ground reaction force (GRF) and tibial axial acceleration during running. A frequency transfer function accurately models this connection, offering insights into shock transmissibility.

Area of Science:

  • Biomechanics
  • Orthopedics
  • Sports Medicine

Background:

  • Understanding the relationship between external forces and bone vibration is crucial for injury prevention.
  • Ground reaction forces (GRF) during locomotion generate vibrations within the tibia.
  • Quantifying this relationship can inform the design of protective equipment and rehabilitation strategies.

Purpose of the Study:

  • To investigate and quantify the relationship between ground reaction force (GRF) and tibial axial acceleration during running.
  • To determine if this relationship can be represented by a frequency transfer function.
  • To assess the generalizability of this relationship across different individuals.

Main Methods:

  • Simultaneous recording of tibial acceleration and GRF in five running subjects.

Related Experiment Videos

  • Measurement of bone acceleration using a transducer on an intracortical pin.
  • Frequency domain analysis of the recorded signals to derive transfer functions.

    • Main Results:

    • A subject-specific frequency transfer function was identified, accurately characterizing the GRF-tibia acceleration relationship.
    • A generalizable transfer function was found to exist across all five subjects.
    • The derived transfer functions provided valuable information on transient shock transmissibility during the running impact phase.

    Conclusions:

    • A predictable relationship exists between GRF and tibial acceleration during running, modelable by frequency transfer functions.
    • This model is consistent across individuals, offering a generalized understanding of impact biomechanics.
    • The findings have implications for analyzing shock absorption and potential injury mechanisms in runners.