Reliability and validity of the Biodex system 3 pro isokinetic dynamometer velocity, torque and position measurements

Springer Science and Business Media LLC - Tập 91 - Trang 22-29 - 2003
Joshua M. Drouin1, Tamara C. Valovich-mcLeod2, Sandra J. Shultz3, Bruce M. Gansneder4, David H. Perrin5
1Department of Public Health, Georgia Southern University, Statesboro, USA
2Department of Sports Health Care, Arizona School of Health Sciences, Mesa, USA
3Department of Exercise and Sports Science, University of North Carolina, Greensboro, USA
4Department of Education, Leadership and Foundations, University of Virginia, Charlottesville, USA
5School of Health and Human Performance, University of North Carolina at Greensboro, Greensboro, USA

Tóm tắt

This study quantitatively assessed the mechanical reliability and validity of position, torque and velocity measurements of the Biodex System 3 isokinetic dynamometer. Trial-to-trial and day-to-day reliability were assessed during three trials on two separate days. To assess instrument validity, measurement of each variable using the Biodex System 3 dynamometer was compared to a criterion measure of position, torque and velocity. Position was assessed at 5° increments across the available range of motion of the dynamometer. Torque measures were assessed isometrically by hanging six different calibrated weights from the lever arm. Velocity was assessed (30°/s to 500°/s) across a 70° arc of motion by manually accelerating the weighted lever arm. With the exception of a systematic decrease in velocity at speeds of 300°/s and higher, the Biodex System 3 performed with acceptable mechanical reliability and validity on all variables tested.

Tài liệu tham khảo

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