Validity and reliability of a linear positional transducer across commonly practised resistance training exercises

Journal of Sports Sciences
Harry F DorrellThomas I Gee

Abstract

This study investigated the validity and reliability of the GymAware PowerTool (GPT). Thirteen resistance trained participants completed three visits, consisting of three repetitions of free-weight back squat, bench press, deadlift (80% one repetition maximum), and countermovement jump. Bar displacement, peak and mean velocity, peak and mean force, and jump height were calculated using the GPT, a three-dimensional motion capture system (Motion Analysis Corporation; 150 Hz), and a force plate (Kistler; 1500 Hz). Least products regression were used to compare agreeability between devices. A within-trial one-way ANOVA, typical error (TE; %), and smallest worthwhile change (SWC) were used to assess reliability. Regression analysis resulted in R2 values of >0.85 for all variables excluding deadlift mean velocity (R2 = 0.54-0.69). Significant differences were observed between visits 3-2 for bench press bar displacement (0.395 ± 0.055 m; 0.383 ± 0.053 m), and deadlift bar displacement (0.557 ± 0.034 m; 0.568 ± 0.034 m). No other significant differences were found. Low to moderate TE (0.6-8.8%) were found for all variables, with SWC ranging 1.7-7.4%. The data provides evidence that the GPT can be used to measure kinetic and kinematic o...Continue Reading

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Citations

Oct 10, 2018·International Journal of Sports Physiology and Performance·Jacob A GoldsmithMichael C Zourdos
Mar 1, 2018·Journal of Strength and Conditioning Research·Liam J HughesBrendan R Scott
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Nov 3, 2021·Sports Biomechanics·Adrián Moreno-VillanuevaMarkel Rico-González

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Software Mentioned

GPT
GymAware PowerTool
Cortex
Tendo Weightlifting Analyser
GymAware
GymAware Pro ( GAP )
MATLAB
GymAware power tool ( GPT
GAP
SPSS

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