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Resumen de Reliability and Validity of Tests to Assess Lower-Body Muscular Power in Children

Jorge del R. Fernández Santos, Paul C. Henning, Edward Jo, Jonatan Ruíz Ruíz, Daniel Dylan Cohen, José Luis González Montesinos, José Castro Piñero

  • The purpose of this study was to analyze the reliability and the criterion-related validity of several lower-body muscular power tests (i.e., standing long jump [SLJ], squat jump, countermovement jump, and Abalakov jump) in children aged 6�12 years. Three hundred sixty three healthy children (168 girls) agreed to participate in this study. All the lower-body muscular power tests were performed twice (7 days apart), whereas the 1 repetition maximum (1RM) leg extension test was performed 2 days after the first session of testing. All the tests showed a high reliability (intertrial difference close to 0 and no significant differences between trials, all p > 0.05). The association between the lower-body muscular power tests and 1RM leg extension test was high (all p < 0.001). The SLJ and the Abalakov jump tests showed the highest association with 1RM leg extension test (R2 = 0.700, test result, weight, height, sex, and age were added in the model). The SLJ test can be a useful tool to assess lower-body muscular power in children when laboratory methods are not feasible because it is practical, time efficient, and low in cost and equipment requirements.


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