Testing a novel isokinetic dynamometer constructed using a 1080 Quantum

PloS One
Alanna K WhintonJamie F Burr

Abstract

This study sought to assess the reliability and comparability of two custom-built isokinetic dynamometers (Model A and Model B) with the gold-standard (Humac Norm). The two custom-built dynamometers consisted of commercially available leg extension machines attached to a robotically controlled resistance device (1080 Quantum), able to measure power, force and velocity outputs. Twenty subjects (14m/6f, 26±4.8yr, 176±7cm, 74.4±12.4kg) performed concentric leg extensions on the custom-built dynamometers and the Humac Norm. Fifteen maximal leg extensions were performed with each leg at 180° s-1, or the linear equivalent (~0.5m s-1). Peak power (W), mean power (W), and fatigue indexes (%) achieved on all three devices were compared. Both custom-built dynamometers revealed high reliability for peak and mean power on repeated tests (ICC>0.88). Coefficient of variation (CV) and standard error of measurement (SEM) were small when comparing power outputs obtained using Model A and the Humac Norm ([Formula: see text] CV = 9.0%, [Formula: see text] SEM = 49W; peak CV = 8.4%, peak SEM = 49W). Whereas, Model B had greater variance ([Formula: see text] CV = 13.3% [Formula: see text] SEM = 120W; peak CV = 14.7%, peak SEM = 146W). The custom-bu...Continue Reading

References

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Citations

Dec 12, 2019·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Christopher PignanelliJamie F Burr
Sep 1, 2020·Journal of Strength and Conditioning Research·Alanna K WhintonJamie F Burr
May 1, 2021·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·W N MorleyJ F Burr
Nov 2, 2021·Frontiers in Physiology·Nejc ŠarabonMihael Perman

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Software Mentioned

1080 Motion
SPSS
LabChart Labchart Pro
Quantum
Humac

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