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Lower-limb influence on sitting balance while reaching forward.

V R Chari, R L Kirby

    Archives of Physical Medicine and Rehabilitation
    |October 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

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    Lower limbs significantly aid sitting balance during forward reaching tasks. Support from thighs and feet placement impacts reach limits, crucial for seat design and prosthetic considerations.

    Area of Science:

    • Biomechanics
    • Human Balance and Posture

    Background:

    • Sitting balance is critical for daily activities.
    • The contribution of lower limbs to seated postural control is not fully understood.

    Purpose of the Study:

    • To investigate the role of lower limbs in maintaining sitting balance during forward reaching.
    • To quantify the effect of foot and thigh support on forward reach limits.

    Main Methods:

    • Twenty healthy volunteers performed maximal forward reaches.
    • Reach limits were measured with varying levels of thigh and foot support.
    • Reaches were assessed at different angles to the sagittal plane.

    Main Results:

    • Full thigh support significantly increased reach distances compared to ischial support when feet were off the floor.

    Related Experiment Videos

  • Reach limits decreased progressively as feet were lifted off the floor, especially with one foot off.
  • Foot and thigh support interactions influenced the extent of forward reach.

    • Conclusions:

    • Lower limbs play a significant role in modulating sitting balance during forward reaching.
    • Optimal seat design should consider thigh and foot support for enhanced stability.
    • Findings have implications for designing assistive devices and prostheses for individuals with mobility impairments.