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The frequency content of gait.

E K Antonsson, R W Mann

    Journal of Biomechanics
    |January 1, 1985
    PubMed
    Summary

    Noise amplification during gait analysis is a challenge. This study presents a simple technique to analyze gait frequency content, aiding in accurate dynamic gait data assessment.

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    Area of Science:

    • Biomechanics
    • Gait Analysis
    • Signal Processing

    Background:

    • Double differentiation of position data amplifies noise, impacting dynamic gait analysis.
    • Accurate assessment of gait data requires understanding signal and noise characteristics in the frequency domain.

    Purpose of the Study:

    • To present a simple technique for determining the frequency content of gait signals.
    • To quantitatively assess errors in raw, filtered, and dynamic gait data by analyzing signal and noise.

    Main Methods:

    • Analysis of frequency domain characteristics of signal and noise.
    • Application of a technique to determine gait frequency content.
    • Utilized data from 12 subjects and 30 gait records.

    Main Results:

    • Demonstrated a method to measure frequency content in gait data.
    • Provided insights into noise amplification in double differentiation of position histories.
    • Established a basis for quantitative error assessment in gait analysis.

    Conclusions:

    • The presented technique offers a straightforward approach to evaluating gait signal frequency.
    • Understanding frequency content is crucial for minimizing errors in dynamic gait analysis.
    • This method aids in improving the reliability of gait data interpretation.

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