VALIDEZ Y FIABILIDAD DEL SISTEMA WIMU PARA MEDIR LA VELOCIDAD DE LA BARRA DURANTE EL EJERCICIO DE MEDIA SENTADILLA
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2018-06-26
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Jaén: Universidad de Jaén
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[ES]El objetivo del presente estudio es determinar la fiabilidad y evaluar la validez concurrente del sistema
WIMU® para medir la velocidad de barra en el ejercicio de media sentadilla, mediante la comparación de
datos con el estándar de oro para este propósito (es decir, un LT sistema). La muestra estaba formada por
19 hombres con experiencia en el levantamiento de pesas que realizaron una prueba de carga incremental
en el ejercicio de media sentadilla. Para medir la Velocidad Media Propulsiva, la Velocidad Media y la
Velocidad Máxima se utilizó un dispositivo inercial (WIMU®) y un transductor de velocidad lineal (TForce). Como una medida de fiabilidad, el % CV varió ~ 6-17% y SEM ~ 0.02-0.11 m/s, mostrando
variaciones similares en ambos dispositivos. La MV, MPV y Vmax fueron subestimados para el sistema
WIMU® en comparación con los datos de T-Force en algunos puntos de la relación carga-velocidad. Las
líneas de regresión revelaron una fuerte relación carga-velocidad usando MV, MPV y Vmax,
independientemente del instrumento utilizado. Los resultados de este estudio demuestran una fiabilidad y
validez aceptable del sistema WIMU® en comparación con el sistema T-Force. El WIMU® se muestra
para proporcionar estimaciones precisas de los perfiles de carga-velocidad del sujeto.
Palabras clave: entrenamiento basado en la velocidad, tecnología, acelerómetro, sensor inercial
[EN]The objective of the present study is to determine the reliability and evaluate the concurrent validity of the WIMU® system to measure the bar speed in the mid-squat exercise, by comparing data with the gold standard for this purpose (ie an LT system). The sample consisted of 19 men with experience in lifting weights who performed an incremental load test in the mid-squat exercise. To measure the Average Propulsive Speed, the Average Speed and the Maximum Speed an inertial device (WIMU®) and a linear speed transducer (T-Force) were used. As a measure of reliability, % CV varied ~ 6-17% and SEM ~ 0.02-0.11 m/s, showing similar variations in both devices. The MV, MPV and Vmax were underestimated for the WIMU® system compared to the T-Force data in some points of the load-speed relationship. The regression lines revealed a strong load-velocity relationship using MV, MPV and Vmax, regardless of the instrument used. The results of this study demonstrate acceptable reliability and validity of the WIMU® system compared to the T-Force system. The WIMU® is displayed to provide accurate estimates of the subject's charge-velocity profiles. Keywords: velocity-based training, technology, accelerometer, inertial sensor.
[EN]The objective of the present study is to determine the reliability and evaluate the concurrent validity of the WIMU® system to measure the bar speed in the mid-squat exercise, by comparing data with the gold standard for this purpose (ie an LT system). The sample consisted of 19 men with experience in lifting weights who performed an incremental load test in the mid-squat exercise. To measure the Average Propulsive Speed, the Average Speed and the Maximum Speed an inertial device (WIMU®) and a linear speed transducer (T-Force) were used. As a measure of reliability, % CV varied ~ 6-17% and SEM ~ 0.02-0.11 m/s, showing similar variations in both devices. The MV, MPV and Vmax were underestimated for the WIMU® system compared to the T-Force data in some points of the load-speed relationship. The regression lines revealed a strong load-velocity relationship using MV, MPV and Vmax, regardless of the instrument used. The results of this study demonstrate acceptable reliability and validity of the WIMU® system compared to the T-Force system. The WIMU® is displayed to provide accurate estimates of the subject's charge-velocity profiles. Keywords: velocity-based training, technology, accelerometer, inertial sensor.
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Educación Física