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Related Experiment Video

Updated: Jul 12, 2025

Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis
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Load modulation affects pediatric lower limb joint moments during a step-up task.

Vatsala Goyal, Keith E Gordon, Theresa Sukal-Moulton

    Medrxiv : the Preprint Server for Health Sciences
    |October 31, 2023
    PubMed
    Summary

    Children

    Area of Science:

    • Pediatric biomechanics
    • Movement analysis
    • Pediatric motor control

    Background:

    • Single-step performance is a key indicator of movement quality in children.
    • Understanding how body weight affects stair ascent in typically developing children is crucial for identifying movement deficits.

    Approach:

    • Investigated the impact of varying body weight loads (-20% to +15%) on pediatric lower limb joint moments during a step-up task.
    • Analyzed peak moments and joint contributions using linear regressions and mixed effects models in 14 participants (5-21 years).

    Key Points:

    • Peak support moments during step-up tasks increased linearly with added body weight.
    • Ankle and knee joints were primary contributors to support moments, with the hip showing significant contribution during the pull-up phase.

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  • Hip abduction moments did not correlate with changes in body weight.

    • Conclusions:

    • Pediatric lower limb joint moments scale with body weight during step-up tasks.
    • Findings provide a baseline for assessing movement quality in pediatric populations and inform rehabilitation strategies for athletes and children with conditions like cerebral palsy.