Estimation of internal consistency and stability reliability using isokinetic segmental curve analysis

dc.contributor.authorEarles-Price, Susan N.en
dc.contributor.committeechairSebolt, Don R.en
dc.contributor.committeememberStratton, Richard K.en
dc.contributor.committeememberHolford, Elyzabeth J.en
dc.contributor.departmentHealth and Physical Educationen
dc.date.accessioned2014-03-14T21:41:00Zen
dc.date.adate2010-07-21en
dc.date.available2014-03-14T21:41:00Zen
dc.date.issued1988-10-05en
dc.date.rdate2010-07-21en
dc.date.sdate2010-07-21en
dc.description.abstractForty normal subjects, 19 males and 21 females, between the ages of 16 and 43 years were studied to examine the reliability of Cybex knee extension curves utilizing Segmental Curve Analysis (SCA). Each subject performed a standardized isokinetic knee extension/flexion test on the Cybex II isokinetic dynamometer. Test protocol consisted of 5 maximum repetitions at a speed of 60 deg/sec. Within one week of the initial test, each subject performed a retest. During testing, all torque and angle measurement information from the Cybex was transmitted to the SCA system. The SCA system plotted, analyzed, and quantified each torque curve for seven specific parameters. The following parameters were quantified by the SCA system: (1) torque at 20 degrees, 70 degrees, and peak torque of knee extension; (2) area of the curve to 20 degrees, 70 degrees and peak torque of knee extension; and (3) area of the torque curve between 20 and 70 degree angles of knee extension. The parameters of peak torque (r=.83 to .97; R=.98 to .99), area to 70 degree angle of knee extension (r=.76 to .87; R=.96 to .98), and area between 20 and 70 degree angles of knee extension (r=.75 to .92; R=.97 to .99) appeared to be the most reliable across trials and days, and were also found to elicit the least amount of variation for both male and female subjects. Coefficients of variation on the parameters of peak torque, area to 70, area between 20 and 70 for females ranged from 15% to 18%. For males, the coefficients of variation for peak torque, area to 70, and area between 20 and 70 ranged from 23% to 27%. Variables quantifying torque and power indices in the middle segment of torque curves appeared to be most reliable as analyzed by the SCA system.en
dc.description.degreeMaster of Scienceen
dc.format.extentviii, 141 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-07212010-020350en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-07212010-020350/en
dc.identifier.urihttp://hdl.handle.net/10919/43850en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1988.E274.pdfen
dc.relation.isformatofOCLC# 19284985en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1988.E274en
dc.subject.lcshExercise therapyen
dc.subject.lcshIsometric exercise -- Physiological effecten
dc.subject.lcshTorqueen
dc.titleEstimation of internal consistency and stability reliability using isokinetic segmental curve analysisen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineHealth and Physical Educationen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen
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