{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,15]],"date-time":"2026-01-15T02:34:45Z","timestamp":1768444485997,"version":"3.49.0"},"reference-count":44,"publisher":"National Athletic Trainers' Association","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2010,7]]},"abstract":"<jats:title>Abstract<\/jats:title>\n        <jats:sec>\n          <jats:title>Context:<\/jats:title>\n          <jats:p>Insufficient lower extremity strength may be a risk factor for lower extremity injuries such as noncontact anterior cruciate ligament tears. Therefore, clinicians need reliable instruments to assess strength deficiencies.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Objective:<\/jats:title>\n          <jats:p>To assess the intrarater, interrater, intrasession, and intersession reliability of a portable fixed dynamometer in measuring the strength of the hip and knee musculature.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Design:<\/jats:title>\n          <jats:p>Crossover study.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Setting:<\/jats:title>\n          <jats:p>Sports medicine research laboratory.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Patients or Other Participants:<\/jats:title>\n          <jats:p>Three raters (A, B, C) participated in this 2-phase study. Raters A and B tested 11 healthy college graduate students (2 men, 9 women) in phase 1. Raters A and C tested 26 healthy college undergraduate students (7 men, 19 women) in phase 2.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Main Outcome Measure(s):<\/jats:title>\n          <jats:p>The dependent variables for the study were hip adductor, hip abductor, hip flexor, hip extensor, hip internal rotator, hip external rotator, knee flexor, and knee extensor peak force.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Results:<\/jats:title>\n          <jats:p>The phase 1 intrasession intraclass correlation coefficients for sessions 1, 2, and 3 ranged from 0.88 to 0.99 (SEM \u200a=\u200a 0.08\u20133.02\u00a0N), 0.85 to 0.99 (SEM \u200a=\u200a 0.26\u20133.88\u00a0N), and 0.92 to 0.96 (SEM \u200a=\u200a 0.52\u20132.76\u00a0N), respectively. Intraclass correlation coefficients ranged from 0.57 to 0.95 (SEM \u200a=\u200a 1.72\u201313.15\u00a0N) for phase 1 intersession values, 0.70 to 0.94 (SEM \u200a=\u200a 1.42\u20139.20\u00a0N) for phase 2 intrarater reliability values, and 0.69 to 0.88 (SEM \u200a=\u200a 1.20\u20138.50\u00a0N) for phase 2 interrater values.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Conclusions:<\/jats:title>\n          <jats:p>The portable fixed dynamometer showed good to high intrasession and intersession reliability values for hip and knee strength. Intrarater and interrater reliability were fair to high, except for hip internal rotation, which showed poor reliability.<\/jats:p>\n        <\/jats:sec>","DOI":"10.4085\/1062-6050-45.4.349","type":"journal-article","created":{"date-parts":[[2011,1,11]],"date-time":"2011-01-11T22:14:09Z","timestamp":1294784049000},"page":"349-356","source":"Crossref","is-referenced-by-count":52,"title":["The Reliability of Portable Fixed Dynamometry During Hip and Knee Strength Assessments"],"prefix":"10.4085","volume":"45","author":[{"given":"Roger O.","family":"Kollock","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"James A.","family":"Onate","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bonnie","family":"Van Lunen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"2557","reference":[{"issue":"11","key":"i1062-6050-45-4-349-Ireland1","series-title":"J Orthop Sports Phys Ther","first-page":"671","article-title":"Hip strength in females with and without patellofemoral pain.","volume":"33","author":"Ireland, M. L.","year":"2003","unstructured":"Ireland, M. L., J. D.Willson, B. T.Ballantyne, and I. M.Davis. Hip strength in females with and without patellofemoral pain.J Orthop Sports Phys Ther2003. 3311:671\u2013676."},{"issue":"1","key":"i1062-6050-45-4-349-Souza1","series-title":"J Orthop Sports Phys Ther","first-page":"12","article-title":"Differences in hip kinematics, muscle strength, and muscle activation between subjects with and without patellofemoral pain.","volume":"39","author":"Souza, R. B.","year":"2009","unstructured":"Souza, R. B. and C. M.Powers. 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Development of a French isometric strength normative database for adults using quantitative muscle testing.Arch Phys Med Rehabil2007. 8810:1289\u20131297."},{"issue":"4","key":"i1062-6050-45-4-349-Cheng1","series-title":"J Appl Physiol","first-page":"1446","article-title":"Fatigue and recovery of power and isometric torque following isotonic knee extensions.","volume":"99","author":"Cheng, A. J.","year":"2005","unstructured":"Cheng, A. J. and C. L.Rice. Fatigue and recovery of power and isometric torque following isotonic knee extensions.J Appl Physiol2005. 994:1446\u20131452."},{"issue":"6","key":"i1062-6050-45-4-349-Knapik1","series-title":"Phys Ther","first-page":"938","article-title":"Isometric, isotonic, and isokinetic torque variations in four muscle groups through a range of joint motion.","volume":"63","author":"Knapik, J. J.","year":"1983","unstructured":"Knapik, J. J., J. E.Wright, R. H.Mawdsley, and J.Braun. Isometric, isotonic, and isokinetic torque variations in four muscle groups through a range of joint motion.Phys Ther1983. 636:938\u2013947."},{"issue":"6","key":"i1062-6050-45-4-349-Kovaleski1","series-title":"Med Sci Sports Exerc","first-page":"895","article-title":"Isotonic preload versus isokinetic knee extension resistance training.","volume":"27","author":"Kovaleski, J. E.","year":"1995","unstructured":"Kovaleski, J. E., R. H.Heitman, T. L.Trundle, and W. F.Gilley. Isotonic preload versus isokinetic knee extension resistance training.Med Sci Sports Exerc1995. 276:895\u2013899."},{"issue":"3","key":"i1062-6050-45-4-349-Stauber1","series-title":"Clin Physiol","first-page":"225","article-title":"Isotonic dynamometry for the assessment of power and fatigue in the knee extensor muscles of females.","volume":"20","author":"Stauber, W. T.","year":"2000","unstructured":"Stauber, W. T., E. R.Barill, R. E.Stauber, and G. R.Miller. 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