Validación de dos Pruebas de Predicción de la Potencia Muscular en el Ejercicio de Press de Banca

espanolEste estudio busco establecer la validez concurrente de los test de prediccion de potencia muscular Palazzi y W5” en el ejercicio press de banca. Participaron 40 estudiantes de educacion fisica de ambos sexos aparentemente sanos de 23,6 ± 2,7 anos. Se aplicaron ambos test simultaneamente con un encoder. Se comparo la potencia estimada de los test de prediccion con la potencia media concentrica (PmC) y potencia media concentrica/excentrica (PmCE) obtenidas con el encoder. Para determinar su validez se calculo el coeficiente de determinacion (R2) y coeficiente de correlacion intraclase (CCI) y se realizo el grafico Bland-Altman. Si bien se encontraron valores elevados de R2 en ambos test de prediccion el analisis del CCI mostro un mayor acuerdo con el encoder en el test de Palazzi con respecto a W5” (PmC: 0,886 y 0,841; PmCE: 0,921 y 0,883 respectivamente). El grafico Bland-Altman mostro que el acuerdo entre los test y el encoder disminuye en los valores mas altos de potencia. Se concluye que ambos test poseen una validez concurrente aceptable como estimadores de potencia muscular en el ejercicio de press de banca aunque se recomienda utilizar preferentemente el test Palazzi y evitar su aplicacion en sujetos de elevada potencia muscular. EnglishThis study pursued to examine the concurrent validity of muscle power prediction test Palazzi and W5” in bench press exercise. 40 physical education apparently healthy students of both sexes of an age range of 23.6 ± 2.7 years old were tested. Both prediction tests were administrated simultaneously with an encoder. The power estimated by both tests was compared with the concentric media power (PmC) and the concentric/eccentric media power (PmCE) obtained with the encoder. To evaluate their validity the determination coefficient (R2) and intra-class correlation coefficient (ICC) were calculated and Bland-Altman plot was generated. Despite both prediction test obtain high values of R2 an analysis of ICC showed a greater agreement with encoder in Palazzi than in W5” (PmC: 0.886 and 0.841; PmCE: 0.921 and 0.883 respectively). Bland-Altman plot showed that the agreement between prediction tests and encoder decreases in higher power values. It is concluded that both tests have acceptable concurrent validity as muscle power estimators in the bench press exercise, although it is recommended to preferably use the Palazzi test and avoid its application in subjects of high muscle power.