The reliability of linear position transducer,force plate and combined measurement of explosive power-time variables during a loaded jump squat in elite athletes |
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| Authors: | Keir T Hansen John B Cronin Michael J Newton |
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| Institution: | 1. School of Exercise, Biomedical and Health Sciences, Edith Cowan University , Joondalup, Australia;2. Worcester Rugby Football Club , Worcester, United Kingdom keir.hansen@warriors.co.uk;4. Sport Performance Research Institute New Zealand, AUT University , Auckland, New Zealand;5. School of Exercise, Biomedical and Health Sciences, Edith Cowan University , Joondalup, Australia |
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| Abstract: | The purpose of this study was to determine the between day reliability of power-time measures calculated with data collected using the linear position transducer or the force plate independently, or a combination of the two technologies. Twenty-five male rugby union players performed three jump squats on two occasions one week apart. Ground reaction forces were measured via a force plate and position data were collected using a linear position transducer. From these data, a number of power-time variables were calculated for each method. The force plate, linear position transducer and a combined method were all found to be a reliable means of measuring peak power (ICC = 0.87‐0.95, CV = 3.4%‐8.0%). The absolute consistency of power-time measures varied between methods (CV = 8.0%‐53.4%). Relative consistency of power-time measures was generally comparable between methods and measures, and for many variables was at an acceptable level (ICC = 0.77‐0.94). Although a number of time-dependent power variables can be reliably calculated from data acquired from the three methods investigated, the reliability of a number of these measures is below that which is acceptable for use in research and for practical applications. |
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| Keywords: | Muscle mechanics training/conditioning jumping |
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