Measuring seated hip extensor strength using a handheld dynamometer: an
examination of the reliability and validity of the protocol |
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| Authors: | Toshiaki Seko Tsuneo Kumamoto Sayo Miura Takumi Kobayashi Yui Takahashi Ryousuke Kaneko Akira Morino Toshikazu Ito |
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| Institution: | 1) Department of Physical Therapy, Hokkaido Chitose Institute of Rehabilitation Technology, Japan;2) Department of Physical Therapy, School of Health and Social Services, Saitama Prefectural University, Japan;3) Department of Rehabilitation, Hokusei Hospital, Japan;4) Department of Rehabilitation, Aizen Hospital, Japan |
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| Abstract: | Purpose] The purpose of this study was to examine the reliability and validity of
measurements of hip extensor muscle strength using a handheld dynamometer (HHD) with
subjects in a sitting position. In doing so, we also aimed to establish a modified method
of measurement for patients with flexion contractures in the trunk and lower extremities.
Subjects and Methods] In 20 healthy males, hip extensor muscle strength was measured
using a handheld dynamometer in sitting, prone, and standing positions by contracting the
hip extensor muscle isometrically with the knee flexed at 90 degrees. For each position,
we investigated the relative and absolute reliability and validity of the measurements,
and compared muscle strength between the different positions. Results] The reliability
and validity of measurements were highest in the sitting position and higher in both the
sitting and standing positions as compared with those in the prone position. Conclusion]
Our findings suggest that measurements taken in a sitting position are accurate in
assessing hip extensor muscle strength and would be applicable to patients with flexion
contractures in the trunk and lower extremities.Key words: Hip extensor strength, Reliability, Bland-Altman analysis |
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