Original Research

The effects of feedback in isokinetic dynamometry: Effects of visual feedback and verbal encouragement on peak torque and total work values in knee extensors testing

Guy van Herp, Ahmad Shah
South African Journal of Physiotherapy | Vol 52, No 4 | a621 | DOI: https://doi.org/10.4102/sajp.v52i4.621 | © 2018 Guy van Herp, Ahmad Shah | This work is licensed under CC Attribution 4.0
Submitted: 20 September 2018 | Published: 30 November 1996

About the author(s)

Guy van Herp, Faculty of Allied Health Sciences and Nursing, Physical Therapy Department, Kuwait University, Kuwait
Ahmad Shah, Faculty of Allied Health Sciences and Nursing, Physical Therapy Department, Kuwait University, Kuwait

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Abstract


The purpose of this study was to examine the effects of visual feedback and verbal encouragement on peak torque and total work measurements during maximum isokinetic concentric activation of knee extensors. Twenty-seven healthy male subjects between the age of 19 and 42 completed the two test sessions 14 days apart using an isokinetic dynamometer at 60°/s and 450°/s. Visual feedback was provided as real-time display of the moment output. Verbal encouragement was done using a standardised procedure. With visual feedback and verbal encouragement peak torque and total work at both speeds were significantly greater than without.
These findings suggest that combined visual and verbal encouragement are strong motivating factors. It is therefore recommended to use feedback and verbal encouragement as part of a standardised procedure during isokinetic testing.

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