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Portable dynamometer anchoring station for measuring strength of the hip extensors and abductors

  • Scott F. Nadler
    Affiliations
    Department of Physical Medicine and Rehabilitation, UMDNJ-NJ Medical School, Newark, NJ (Nadler, DePrince, Hauesien, Stitik, Price); and the Kessler Institute for Rehabilitation, West Orange, NJ (Malanga)
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  • Melissa L. DePrince
    Affiliations
    Department of Physical Medicine and Rehabilitation, UMDNJ-NJ Medical School, Newark, NJ (Nadler, DePrince, Hauesien, Stitik, Price); and the Kessler Institute for Rehabilitation, West Orange, NJ (Malanga)
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  • Norman Hauesien
    Affiliations
    Department of Physical Medicine and Rehabilitation, UMDNJ-NJ Medical School, Newark, NJ (Nadler, DePrince, Hauesien, Stitik, Price); and the Kessler Institute for Rehabilitation, West Orange, NJ (Malanga)
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  • Gerard A. Malanga
    Affiliations
    Department of Physical Medicine and Rehabilitation, UMDNJ-NJ Medical School, Newark, NJ (Nadler, DePrince, Hauesien, Stitik, Price); and the Kessler Institute for Rehabilitation, West Orange, NJ (Malanga)
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  • Todd P. Stitik
    Affiliations
    Department of Physical Medicine and Rehabilitation, UMDNJ-NJ Medical School, Newark, NJ (Nadler, DePrince, Hauesien, Stitik, Price); and the Kessler Institute for Rehabilitation, West Orange, NJ (Malanga)
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  • Eric Price
    Affiliations
    Department of Physical Medicine and Rehabilitation, UMDNJ-NJ Medical School, Newark, NJ (Nadler, DePrince, Hauesien, Stitik, Price); and the Kessler Institute for Rehabilitation, West Orange, NJ (Malanga)
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  • Author Footnotes
    NO LABEL a. Model CSD500 strength dynamometer; Chatillon, Lexington, KY.

      Abstract

      Nadler SF, DePrince ML, Hauesien N, Malanga GA, Stitik TP, Price E. Portable dynamometer anchoring station for measuring strength of the hip extensors and abductors. Arch Phys Med Rehabil 2000;81:1072-6. Objective: To assess the reliability of a specially designed dynamometer anchoring station in the measurement of hip muscle strength. Design: Prospective study using test-retest design. Setting: Outpatient clinic setting. Participants: Ten subjects, ages 25 to 35yrs. Main Outcome Measures: Using the apparatus, three consecutive measures were recorded for hip abduction and extension by an inexperienced examiner. Two weeks later, the same subjects were retested, with the evaluator blinded to the initial results. In both the test and retest, average and maximal values of strength were calculated for each muscle. Reliability of the device was assessed by computing the intraclass correlation coefficients and coefficients of variation (CVs). Results: Intraclass correlation coefficients ranged from .94 to .98. The average CV for the maximal and average abduction strength had values of 4.77% and 4%, respectively. The maximal and average extension strength had average CV values of 8.06% and 7.83%, respectively. Conclusion: This specially designed dynamometer anchoring station has been found to be highly reliable in the measurement of hip girdle strength and has the advantage of easy adjustability and portability for large-scale screenings. This device enhances the reliability of the dynamometer, which may be subject to considerable variability when applied by hand to the powerful hip girdle musculature. © 2000 by the American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation

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