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Abstract(s)
Enquadramento: O futebol é um desporto coletivo com complexidade técnica e tática, e elevada exigência física e psicológica – agrega ações variadas de caráter intermitente, alternando sucessivamente fases de esforço e de repouso – desde as explosivas como sprintar à velocidade máxima, até intensidades de baixa exigência como andar ou estar parado (Dolci et al., 2020). Os saltos são um tipo de ação com um fator preponderante nos guarda-redes de futebol. O perfil força-velocidade é uma ferramenta utilizada para classificar as capacidades do sistema neuromuscular do atleta numa tarefa específica. Este estudo pretende qualificar e quantificar o perfil FV vertical, no squat jump, de guarda-redes de futebol que competem num contexto semiprofissional (3ª e 4ª divisões portuguesas) e verificar se o perfil dos GR está orientado para a velocidade (Hervéou et al., 2018).
Métodos: 10 guarda-redes de futebol (4 da 3ª divisão e 6 da 4ª divisão) com idades compreendidas entre os 17 e os 30 anos (média de 23,40 ± 3,92 anos), com estatura média de 1,86 ± 0,04 metros e com massa corporal média de 86,53 ± 9,02 Kg), realizaram o teste de salto vertical, squat jump, de acordo com o protocolo (5 séries de 2-3 repetições pela seguinte ordem de cargas (3 repetições sem carga adicionada; 3 repetições com o acréscimo de carga de 25% da massa corporal do atleta; 3 repetições com o acréscimo de carga de 50% da massa corporal do atleta; 2 repetições com o acréscimo de carga de 75% da massa corporal do atleta e 2 repetições com o acréscimo de carga de 100% da massa corporal do atleta). Foi realizado de acordo com o método de Samozino et al., (2008). Foram analisados a altura de salto e as seguintes variáveis mecânicas utilizadas do perfil de força-velocidade vertical (F0 (N/kg), 𝑉0 (m/s), P0 (W/kg), SFV (N.s.m-1. kg-1), SFVopt (N.s.m-1. kg-1) e FVIMB (%)).
Resultados: Os resultados do estudo são os seguintes: SJ, 37,9 ± 5,1 cm; F0, 30,1 ± 3,7 N.kg-1; 𝑉0, 4,63 ± 1,84 m.s-1; Pmax, 33,9 ± 10,8 W.kg-1; SFV, -7.41 ± 2.82 N.s.m-1. kg-1; FVIMB, 64,70 ± 28,62%.
Conclusão: O perfil Força-Velocidade vertical dos GR semiprofissionais tende para a velocidade – assemelhando-se ao de atletas de outras modalidades cuja capacidade física preponderante é a velocidade.
Objective: Football is a collective sport with technical and tactical complexity, and high physical and psychological demand - it brings together varied actions of an intermittent nature, successively alternating phases of effort and rest - from explosive ones such as sprinting at maximum speed, to low-demand intensities such as walking or standing still (Dolci et al., 2020). Jumping is a type of action with a preponderant factor in soccer goalkeepers. The force-velocity profile is a tool used to assess the ability of the athlete's neuromuscular system in a specific task. This study aims to qualify and quantify the vertical force-velocity profile, in the squat jump, of soccer goalkeepers competing in a semi-professional context (3rd and 4th Portuguese divisions) and to verify whether the profile of the goalkeeper is oriented towards velocity (Hervéou et al., 2018). Method: 10 soccer goalkeepers (4 from the 3rd division and 6 from the 4th division) aged between 17 and 30 years (average 23.40 ± 3.92 years old), with an average height of 1.86 ± 0.04 meters and an average body mass of 86.53 ± 9. 02 kg), performed the vertical jump test, squat jump, according to the protocol (5 sets of 2-3 repetitions in the following order of loads (3 repetitions with no load added; 3 repetitions with a load added of 25% of the athlete's body mass; 3 repetitions with a load added of 50% of the athlete's body mass; 2 repetitions with a load added of 75% of the athlete's body mass and 2 repetitions with a load added of 100% of the athlete's body mass). It was carried out according to the method of Samozino et al. (2008). The jump height and the following mechanical variables used in the vertical force-velocity profile were analysed F0 (N/kg), 𝑉0 (m/s), P0 (W/kg), SFV (N.s.m-1. kg-1), SFVopt (N.s.m-1. kg-1) e FVIMB (%). Results: The results of the study are as follows: SJ, 37.9 ± 5.1 cm; F0, 30.1 ± 3.7 N.kg-1; V0, 4.63 ± 1.84 m.s-1; Pmax, 33.9 ± 10.8 W.kg-1; SFV, -7.41 ± 2.82; FVIMB, 64.70 ± 28.62%. Conclusion: The vertical force-velocity profile of semi-professional goalkeeper tends towards velocity – similar to the result that athletes in other sports where the main physical ability is velocity have.
Objective: Football is a collective sport with technical and tactical complexity, and high physical and psychological demand - it brings together varied actions of an intermittent nature, successively alternating phases of effort and rest - from explosive ones such as sprinting at maximum speed, to low-demand intensities such as walking or standing still (Dolci et al., 2020). Jumping is a type of action with a preponderant factor in soccer goalkeepers. The force-velocity profile is a tool used to assess the ability of the athlete's neuromuscular system in a specific task. This study aims to qualify and quantify the vertical force-velocity profile, in the squat jump, of soccer goalkeepers competing in a semi-professional context (3rd and 4th Portuguese divisions) and to verify whether the profile of the goalkeeper is oriented towards velocity (Hervéou et al., 2018). Method: 10 soccer goalkeepers (4 from the 3rd division and 6 from the 4th division) aged between 17 and 30 years (average 23.40 ± 3.92 years old), with an average height of 1.86 ± 0.04 meters and an average body mass of 86.53 ± 9. 02 kg), performed the vertical jump test, squat jump, according to the protocol (5 sets of 2-3 repetitions in the following order of loads (3 repetitions with no load added; 3 repetitions with a load added of 25% of the athlete's body mass; 3 repetitions with a load added of 50% of the athlete's body mass; 2 repetitions with a load added of 75% of the athlete's body mass and 2 repetitions with a load added of 100% of the athlete's body mass). It was carried out according to the method of Samozino et al. (2008). The jump height and the following mechanical variables used in the vertical force-velocity profile were analysed F0 (N/kg), 𝑉0 (m/s), P0 (W/kg), SFV (N.s.m-1. kg-1), SFVopt (N.s.m-1. kg-1) e FVIMB (%). Results: The results of the study are as follows: SJ, 37.9 ± 5.1 cm; F0, 30.1 ± 3.7 N.kg-1; V0, 4.63 ± 1.84 m.s-1; Pmax, 33.9 ± 10.8 W.kg-1; SFV, -7.41 ± 2.82; FVIMB, 64.70 ± 28.62%. Conclusion: The vertical force-velocity profile of semi-professional goalkeeper tends towards velocity – similar to the result that athletes in other sports where the main physical ability is velocity have.
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Keywords
Futebol Guarda-redes Força Velocidade Potência Squat Jump Football Goalkeepers Force Velocity Power Squat Jump