Validity, reliability and sensitivity of a portable isometric dynamometer compared to a force plate to measure strength performance variables
This study aims to investigate the test-retest reliability and validity of a portable isometric dynamometer compared to the force platform of the Isometric mid-thigh pull (IMTP) test. 20 national female and male athletes (age: 19.25 6.008 years) from various sporting and training backgrounds partic...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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Nanyang Technological University
2022
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| Online Access: | https://hdl.handle.net/10356/162559 |
| _version_ | 1826130013132423168 |
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| author | Janarthanam, Luke Mahendran |
| author2 | - |
| author_facet | - Janarthanam, Luke Mahendran |
| author_sort | Janarthanam, Luke Mahendran |
| collection | NTU |
| description | This study aims to investigate the test-retest reliability and validity of a portable isometric dynamometer compared to the force platform of the Isometric mid-thigh pull (IMTP) test. 20 national female and male athletes (age: 19.25 6.008 years) from various sporting and training backgrounds participated in 2 test sessions conducted a week apart from one another. They performed 3 IMTP efforts for each session, separated by a 2min rest between each trial. Peak force, rate of force development (RFD), and time-specific point values (100, 200, 300ms) were compared across devices and within devices. The isometric dynamometer reported high reliability (intraclass correlation coefficient (ICC) = 0.879, 90% confidence interval (CI): 0.755 - 0.942; Pearson’s product correlation r = 0.876; p = - 0.650) and acceptable validity (ICC = 0.973, 90% CI: 0.942 - 0.987, r = -0.284; p = 0.204) for peak force values. However, significant differences (p<0.001) were found between the dynamometer and force platform for RFD and force at the time-specific points. The dynamometer also did not show acceptable reliability for these measures of the IMTP assessment. Thus, the isometric dynamometer is a valid and reliable instrument to measure peak force, but not RFD and force at time-specific points. This supports the usage of the device as a portable and more affordable option compared to a traditional force platform to measure peak force. However, coaches and practitioners should understand that values from these 2 devices are not interchangeable. |
| first_indexed | 2024-10-01T07:49:59Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/162559 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:49:59Z |
| publishDate | 2022 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1625592023-09-13T02:32:34Z Validity, reliability and sensitivity of a portable isometric dynamometer compared to a force plate to measure strength performance variables Janarthanam, Luke Mahendran - National Youth Sports Institute Robotics Research Centre Teo Wei Peng weipeng.teo@nie.edu.sg Science::General This study aims to investigate the test-retest reliability and validity of a portable isometric dynamometer compared to the force platform of the Isometric mid-thigh pull (IMTP) test. 20 national female and male athletes (age: 19.25 6.008 years) from various sporting and training backgrounds participated in 2 test sessions conducted a week apart from one another. They performed 3 IMTP efforts for each session, separated by a 2min rest between each trial. Peak force, rate of force development (RFD), and time-specific point values (100, 200, 300ms) were compared across devices and within devices. The isometric dynamometer reported high reliability (intraclass correlation coefficient (ICC) = 0.879, 90% confidence interval (CI): 0.755 - 0.942; Pearson’s product correlation r = 0.876; p = - 0.650) and acceptable validity (ICC = 0.973, 90% CI: 0.942 - 0.987, r = -0.284; p = 0.204) for peak force values. However, significant differences (p<0.001) were found between the dynamometer and force platform for RFD and force at the time-specific points. The dynamometer also did not show acceptable reliability for these measures of the IMTP assessment. Thus, the isometric dynamometer is a valid and reliable instrument to measure peak force, but not RFD and force at time-specific points. This supports the usage of the device as a portable and more affordable option compared to a traditional force platform to measure peak force. However, coaches and practitioners should understand that values from these 2 devices are not interchangeable. Bachelor of Science (Sport Science and Management) 2022-11-01T04:05:19Z 2022-11-01T04:05:19Z 2022 Final Year Project (FYP) Janarthanam, L. M. (2022). Validity, reliability and sensitivity of a portable isometric dynamometer compared to a force plate to measure strength performance variables. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/162559 https://hdl.handle.net/10356/162559 en BM-EXP-031 application/pdf Nanyang Technological University |
| spellingShingle | Science::General Janarthanam, Luke Mahendran Validity, reliability and sensitivity of a portable isometric dynamometer compared to a force plate to measure strength performance variables |
| title | Validity, reliability and sensitivity of a portable isometric dynamometer compared to a force plate to measure strength performance variables |
| title_full | Validity, reliability and sensitivity of a portable isometric dynamometer compared to a force plate to measure strength performance variables |
| title_fullStr | Validity, reliability and sensitivity of a portable isometric dynamometer compared to a force plate to measure strength performance variables |
| title_full_unstemmed | Validity, reliability and sensitivity of a portable isometric dynamometer compared to a force plate to measure strength performance variables |
| title_short | Validity, reliability and sensitivity of a portable isometric dynamometer compared to a force plate to measure strength performance variables |
| title_sort | validity reliability and sensitivity of a portable isometric dynamometer compared to a force plate to measure strength performance variables |
| topic | Science::General |
| url | https://hdl.handle.net/10356/162559 |
| work_keys_str_mv | AT janarthanamlukemahendran validityreliabilityandsensitivityofaportableisometricdynamometercomparedtoaforceplatetomeasurestrengthperformancevariables |