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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Static Stretching Alters Neuromuscular Function and Pacing Strategy, but Not Performance during a 3-Km Running Time-Trial

Texto completo
Autor(es):
Damasceno, Mayara V. [1] ; Duarte, Marcos [2] ; Pasqua, Leonardo A. [3] ; Lima-Silva, Adriano E. [4] ; MacIntosh, Brian R. [5] ; Bertuzzi, Romulo [6]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Sao Paulo. Sch Phys Educ & Sport
[2] Fed Univ ABC. Sao Paulo
[3] Univ Sao Paulo. Sch Phys Educ & Sport
[4] Univ Fed Pernambuco. Dept Phys Educ & Sports Sci
[5] Univ Calgary. Fac Kinesiol
[6] Univ Sao Paulo. Sch Phys Educ & Sport
Número total de Afiliações: 6
Tipo de documento: Artigo Científico
Fonte: PLoS One; v. 9, n. 6 JUN 6 2014.
Citações Web of Science: 7
Resumo

Purpose: Previous studies report that static stretching (SS) impairs running economy. Assuming that pacing strategy relies on rate of energy use, this study aimed to determine whether SS would modify pacing strategy and performance in a 3-km running time-trial. Methods: Eleven recreational distance runners performed a) a constant-speed running test without previous SS and a maximal incremental treadmill test; b) an anthropometric assessment and a constant-speed running test with previous SS; c) a 3-km time-trial familiarization on an outdoor 400-m track; d and e) two 3-km time-trials, one with SS (experimental situation) and another without (control situation) previous static stretching. The order of the sessions d and e were randomized in a counterbalanced fashion. Sit-and-reach and drop jump tests were performed before the 3-km running time-trial in the control situation and before and after stretching exercises in the SS. Running economy, stride parameters, and electromyographic activity (EMG) of vastus medialis (VM), biceps femoris (BF) and gastrocnemius medialis (GA) were measured during the constant-speed tests. Results: The overall running time did not change with condition (SS 11:35 +/- 00:31 s; control 11:28 +/- 00:41 s, p=0.304), but the first 100 m was completed at a significantly lower velocity after SS. Surprisingly, SS did not modify the running economy, but the iEMG for the BF (+22.6%, p=0.031), stride duration (+2.1%, p=0.053) and range of motion (+11.1%, p = 0.0001) were significantly modified. Drop jump height decreased following SS (-9.2%, p=0.001). Conclusion: Static stretch impaired neuromuscular function, resulting in a slow start during a 3-km running time-trial, thus demonstrating the fundamental role of the neuromuscular system in the self-selected speed during the initial phase of the race. (AU)

Processo FAPESP: 10/13913-6 - Economia de corrida e força muscular: uma relação com o polimorfismo R577X do gene ACTN3
Beneficiário:Leonardo Alves Pasqua
Modalidade de apoio: Bolsas no Brasil - Mestrado
Processo FAPESP: 11/10742-9 - O treinamento de força é capaz de alterar a estratégia de corrida em uma prova de 10 km?
Beneficiário:Rômulo Cássio de Moraes Bertuzzi
Modalidade de apoio: Auxílio à Pesquisa - Regular
Processo FAPESP: 11/02769-4 - O treinamento de força é capaz de alterar a estratégia de corrida em uma prova de 10 km?
Beneficiário:Mayara Vieira Damasceno
Modalidade de apoio: Bolsas no Brasil - Mestrado