Testing a novel isokinetic dynamometer constructed using a 1080 Quantum.
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 resis...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2018-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC6054416?pdf=render |
| _version_ | 1830460673264451584 |
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| author | Alanna K Whinton Kyle M A Thompson Geoffrey A Power Jamie F Burr |
| author_facet | Alanna K Whinton Kyle M A Thompson Geoffrey A Power Jamie F Burr |
| author_sort | Alanna K Whinton |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-21T11:15:56Z |
| format | Article |
| id | doaj.art-94a684f8486a45cf90c0cc887b93db4e |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-21T11:15:56Z |
| publishDate | 2018-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-94a684f8486a45cf90c0cc887b93db4e2022-12-21T19:05:56ZengPublic Library of Science (PLoS)PLoS ONE1932-62032018-01-01137e020117910.1371/journal.pone.0201179Testing a novel isokinetic dynamometer constructed using a 1080 Quantum.Alanna K WhintonKyle M A ThompsonGeoffrey A PowerJamie F BurrThis 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.http://europepmc.org/articles/PMC6054416?pdf=render |
| spellingShingle | Alanna K Whinton Kyle M A Thompson Geoffrey A Power Jamie F Burr Testing a novel isokinetic dynamometer constructed using a 1080 Quantum. PLoS ONE |
| title | Testing a novel isokinetic dynamometer constructed using a 1080 Quantum. |
| title_full | Testing a novel isokinetic dynamometer constructed using a 1080 Quantum. |
| title_fullStr | Testing a novel isokinetic dynamometer constructed using a 1080 Quantum. |
| title_full_unstemmed | Testing a novel isokinetic dynamometer constructed using a 1080 Quantum. |
| title_short | Testing a novel isokinetic dynamometer constructed using a 1080 Quantum. |
| title_sort | testing a novel isokinetic dynamometer constructed using a 1080 quantum |
| url | http://europepmc.org/articles/PMC6054416?pdf=render |
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