Estatuto posicional, força explosiva dos membros inferiores e velocidade imprimida à bola no remate em futebol. Um estudo com jovens praticantes do escalão sub-17

Abstract

Positional Status, Explosive Strength and Ball Speed in Kicking Performance of Young Soccer Players. Of all the skills required to participate in Soccer, kicking and jumping have received great attention in different performance levels. The purpose of this study was to evaluate explosive strength of lower limbs and its relationship with ball speed, in young soccer players, according to their positional status. Thirty-one Portuguese players aged 16,52 ± 0,57 years and with an average of 8,26 ± 0,96 years of practice, participated in the study (4 goalkeepers, 9 fullbacks, 13 midfields and 5 forwards). A Stalker device (Professional Sports Radar) was used to assess ball speed during soccer kicking performance, and an Ergojump (Digitime 1000, Digitest Finland) was used to register the flight time in each vertical jump performed, in order to calculate the explosive strength of lower limbs. It was possible to verify that a positive correlation exists between explosive strength of lower limbs and ball speed (r = 0,10, p > 0.05 for the squat jump; r = 0,07, p > 0.05 for the countermovement jump). Forward players present higher explosive strength values and higher values in ball speed, when compared to other players, but we haven’t found statistical differences for any cases.