Comparação entre a intensidade do esforço realizada por jovens futebolistas no primeiro e no segundo tempo do jogo de Futebol.

Lucas Mortimer

Luciano Condessa

Vinícius Rodrigues

Daniel Coelho

Danusa Soares

Emerson Silami-Garcia

 

Universidade Federal de Minas Gerais

Escola de Educação Física, Fisioterapia e Terapia Ocupacional, Centro de Excelência Esportiva (CENESP), Belo Horizonte, Minas Gerais, Brasil.

 

 

RESUMO

Constitui objetivo deste estudo comparar a intensidade do esforço (IE) de atletas de futebol entre o primeiro e o segundo tempo de jogos oficiais. Métodos: Foram avaliados 25 atletas (17,5 ± 1,2 anos; 8,5 ± 1,0% de gordura corporal; 175,1 ± 6,8 cm; 69,3 ± 5,2 kg e VO2máx de 52,2 ± 3,3 mlO2•kg-1•min-1) pertencentes a um clube da primeira divisão do futebol brasileiro. A freqüência cardíaca (FC) dos atletas foi medida usando-se um conjunto de cardiofrequencímetros, durante jogos de competições oficiais, sendo 14 jogos da categoria juvenil (menos de 17 anos) e 8 jogos da categoria júnior (menos de 21 anos). A freqüência cardíaca máxima (FCmáx) de cada atleta foi considerada como o maior valor de FC observado entre dois testes máximos (corrida de 1000m e 2400m) utilizados para a determinação da mesma. Nos casos em que foram observados valores superiores da FC durante as situações de jogo em relação aos testes, esta foi considerada como a FCmáx individual. Os resultados foram analisados usando-se o teste t-Student com nível de significância adotado de p<0,05. Resultados: Foi observada diferença (p<0,01) da FC média e do percentual da freqüência cardíaca máxima (%FCmáx) entre o primeiro tempo (170 ± 8 bpm e 85,2 ± 4,5%FCmáx) e o segundo tempo (166 ± 10 bpm e 82,7 ± 4,6%FCmáx). Os resultados traduzem uma menor intensidade do esforço no segundo tempo de jogo, comparativamente com o primeiro tempo.

Palavras-chave: futebol, freqüência cardíaca, intensidade de esforço.

 

ABSTRACT

Comparison between the effort intensity of young soccer players in the first and second halves of the soccer game.

Objective: Compare the effort intensity (IE) of young soccer players between the first and second halves of official games. Methods: 25 athletes were evaluated (17,5 ± 1,2 years; 8,5 ± 1,0% of body fat; 175,1 ± 6,8 cm; 69,3 ± 5,2 kg and VO2máx of 52,2 ± 3,3 mlO2•kg-1•min-1) who pertained to a club of the first division of the Brazilian soccer. Heart rate (HR) of the athletes was measured using a set of heart rate monitors, during official games, being 14 games of the under-17 category (U-17) and 8 games of the under-20 category (U-20). The maximal heart rate (MHR) for each athlete was considered as the highest HR observed during two maximal effort tests (race of 1000m and 2400m). In the cases which a higher value of HR was observed during game situations in relation to the tests, this was considered the MHR. Results were analyzed using Student t test and the accepted level of significance was p<0,05. Results: There was a significant difference (p<0,01) between the average HR and the percentage of maximal heart rate (%MHR) between first half (170 ± 8 bpm and 85,2 ± 4,5%MHR) and second half (166 ± 10 bpm e 82,7 ± 4,6%MHR). These results show a lower effort intensity in the second half of the game, in comparison with the first half.

Key Words: soccer, heart rate, effort intensity.

 

 

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AGRADECIMENTOS

CNPq, CAPES, FAPEMIG e Ministério do Esporte.

CORRESPONDÊNCIA

Emerson Silami Garcia

Rua Rio de Janeiro, 2779, apto. 602,

Lourdes, Belo Horizonte, MG

BRASIL

silami@ufmg.br