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The stretch-shortening cycle efficiency is dependent on the maturational stage / A eficiência do ciclo alongamento-encurtamento é dependente do estágio maturacional
Dantas, Matheus; Queiros, Victor Sabino de; Fonseca, Fabiano de Souza; Almeida-Neto, Paulo Francisco de; Teixeira, Rômulo Vasconcelos; Silva, Leandro Medeiros da; Aidar, Felipe J.; Matos, Dihogo Gama de; Cabral, Breno Guilherme de Araújo Tinoco.
  • Dantas, Matheus; Federal University of Rio Grande do Norte. Graduate Program in Physical Education. Natal. BR
  • Queiros, Victor Sabino de; Federal University of Rio Grande do Norte. Graduate Program in Physical Education. Natal. BR
  • Fonseca, Fabiano de Souza; Federal University Rural Pernambuco. Departament of Physical Education. Recife. BR
  • Almeida-Neto, Paulo Francisco de; Federal University of Rio Grande do Norte. Graduate Program in Physical Education. Natal. BR
  • Teixeira, Rômulo Vasconcelos; Federal University of Rio Grande do Norte. Graduate Program in Physical Education. Natal. BR
  • Silva, Leandro Medeiros da; Federal University of Rio Grande do Norte. Graduate Program in Physical Education. Natal. BR
  • Aidar, Felipe J.; Federal University of Sergipe. Department of Physical Education. São Cristovão. BR
  • Matos, Dihogo Gama de; Institute of Parasitology. McGill University. Montreal. CA
  • Cabral, Breno Guilherme de Araújo Tinoco; Federal University of Rio Grande do Norte. Graduate Program in Physical Education. Natal. BR
Rev. bras. cineantropom. desempenho hum ; 22: e72597, 2020. tab, graf
Article in English | LILACS-Express | LILACS | ID: biblio-1137246
Responsible library: BR1.1
ABSTRACT
Abstract Maturation interferes with physiological and mechanical aspects of muscle contraction. The aim of the present study was to compare the efficiency of the stretch-shortening cycle (SSC) between different maturation stages. One hundred forty six young people, with 72 boys and 74 girls, were recruited to participate in the study. Sexual maturation was measured and the group was stratified into adolescents (> 3 auto-tanner) and children (<2 auto-tanner). Squat jump (SJ) and countermovement jump (CMJ) performance were measured to measure reactive force (RF) capacity, eccentric utilization ratio (EUR) and pre-stretch augmentation (PSAP). The children did not present statistical difference between SJ and CMJ (t(55)= -1.93; ∆ = -0.61; 95% CI = -1.24 to -0.02; p = 0.058), while the adolescents presented higher performance of CMJ (t(89)= -12.28; ∆ = -2.44; 95% CI = -2.84 to -2.05; p <0.001). In addition, adolescents had higher RF performance (t(144)= 5.18; p <0.0001; 95% CI = 2.53 to 1.13), PSAP (t(144)= 4.38; p <0.0001; 95% CI = 14.00 to 5.29) and EUR (t(144)= 4.38; p <0.0001; 95% CI = 0.14 to 0.05). We conclude that more mature young people have better SSC utilization.
RESUMO
Resumo Maturação interfere em aspectos fisiológicos e mecânicos da contração muscular. O objetivo do estudo foi comparar a eficiência do ciclo alongamento-encurtamento (SSC) em diferentes estágios maturacionais. Cento e quarenta e seis jovens, sendo 72 meninos e 74 meninas, foram recrutados para participar do estudo. Maturação sexual foi mensurada e o grupo foi estratificado em adolescentes (≥ 3 e crianças (< estágio 2). Salto estático (SJ) e o salto contramovimento (CMJ) foram utilizados para mensurar a força reativa (RF), razão de utilização da excêntrica (EUR) e aumento do pré-estiramento (PSAP). As crianças não apresentaram diferença significante entre SJ e CMJ (t(55)= -1.93; ∆ = -0.61; 95% CI = -1.24 to -0.02; p = 0.058), Enquanto que os adolescentes apresentaram maior desempenho de CMJ (t(89)= -12.28; ∆ = -2.44; 95% CI = -2.84 to -2.05; p <0.001). Em adição, adolescentes apresentaram maior RF (t(144)= 5.18; p <0.0001; 95% CI = 2.53 to 1.13), PSAP (t(144)= 4.38; p <0.0001; 95% CI = 14.00 to 5.29) e EUR (t(144)= 4.38; p <0.0001; 95% CI = 0.14 to 0.05). Nós concluímos que jovens com mais maturados apresentam maior capacidade de utilização do SSC.


Full text: Available Index: LILACS (Americas) Language: English Journal: Rev. bras. cineantropom. desempenho hum Journal subject: Physical Education / Sports Medicine / MEDICINA FISICA E REABILITACAO Year: 2020 Type: Article Affiliation country: Brazil / Canada Institution/Affiliation country: Federal University Rural Pernambuco/BR / Federal University of Rio Grande do Norte/BR / Federal University of Sergipe/BR / Institute of Parasitology/CA

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Full text: Available Index: LILACS (Americas) Language: English Journal: Rev. bras. cineantropom. desempenho hum Journal subject: Physical Education / Sports Medicine / MEDICINA FISICA E REABILITACAO Year: 2020 Type: Article Affiliation country: Brazil / Canada Institution/Affiliation country: Federal University Rural Pernambuco/BR / Federal University of Rio Grande do Norte/BR / Federal University of Sergipe/BR / Institute of Parasitology/CA