Testing a novel isokinetic dynamometer constructed using a 1080 Quantum

Autor: Geoffrey A. Power, Kyle Thompson, Alanna K. Whinton, Jamie F. Burr
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Male
Research Validity
Velocity
lcsh:Medicine
Concentric
Material Fatigue
0302 clinical medicine
Materials Physics
Medicine and Health Sciences
Public and Occupational Health
lcsh:Science
Musculoskeletal System
Mathematics
Multidisciplinary
Physics
Mathematical analysis
Classical Mechanics
Equipment Design
Research Assessment
Absolute power
Sports Science
Norm (mathematics)
Isokinetic dynamometer
Physical Sciences
Muscle Fatigue
Legs
Engineering and Technology
Female
Anatomy
Research Article
Adult
Coefficient of variation
Materials Science
Equipment
Muscle Strength Dynamometer
Research and Analysis Methods
Motion
03 medical and health sciences
Humans
Muscle Strength
Sports and Exercise Medicine
Exercise
Damage Mechanics
Leg
Dynamometer
Limbs (Anatomy)
lcsh:R
Biology and Life Sciences
Reproducibility of Results
Physical Activity
030229 sport sciences
Standard error
Torque
Physical Fitness
Leg extension
lcsh:Q
030217 neurology & neurosurgery
Zdroj: PLoS ONE, Vol 13, Iss 7, p e0201179 (2018)
PLoS ONE
ISSN: 1932-6203
Popis: 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-built dynamometers are capable of highly reliable measures, but absolute power outputs varied depending on the leg extension model. Consistent use of a single model offers reliable results for tracking muscular performance over time or testing an intervention.
Databáze: OpenAIRE
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