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Related Experiment Videos

Isometric elbow strength in normal individuals.

L J Askew, K N An, B F Morrey

    Clinical Orthopaedics and Related Research
    |September 1, 1987
    PubMed
    Summary
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    Men exhibit twice the isometric elbow strength of women, with dominant limbs being 6% stronger. Extension strength averages 61% of flexion, and pronation is 86% of supination strength.

    Area of Science:

    • Orthopedics
    • Biomechanics
    • Human Physiology

    Background:

    • Understanding normative isometric elbow strength is crucial for diagnosing and managing musculoskeletal conditions.
    • Variations in strength based on sex and limb dominance are important considerations in clinical assessments.

    Purpose of the Study:

    • To quantify isometric elbow strength in a healthy adult population.
    • To investigate the influence of sex and limb dominance on elbow strength.
    • To establish normative data for elbow flexion, extension, pronation, and supination.

    Main Methods:

    • Isometric elbow strength was measured using torque cell dynamometers.
    • 104 healthy subjects (mean age 43 years, range 21-79 years) participated.
    • Strength was assessed for elbow flexion, extension, forearm pronation, and supination, as well as grip strength.

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    Main Results:

    • Men demonstrated approximately twice the strength of women across all measured functions.
    • The dominant extremity was, on average, 6% stronger than the non-dominant extremity.
    • Mean extension strength was 61% relative to flexion strength.
    • Mean pronation strength was 86% relative to supination strength.

    Conclusions:

    • Significant differences in isometric elbow strength exist between sexes and between dominant and non-dominant limbs.
    • Established normative values provide a benchmark for clinical evaluation and rehabilitation.
    • These findings contribute to a better understanding of upper extremity biomechanics.