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Previous issue date: 2010-12-01 / To evaluate the effects of warm-up and stretching, singly or combined, on
isokinetic performance and electromyographic activity of the biceps femoris.
Materials and methods: Sixty-four volunteers of both sexes, with mean age of 23,1
? 3,5 years and mean body mass index of 23,5 ? 2,5 Kg/m2 were randomly assigned
into 4 groups: control, warm-up (stationary bicycle for 10 minutes), stretching (4 sets
of 30 seconds of hamstring muscles static stretching) and warm-up + stretching. All
the volunteers were submitted to evaluation pre and post-intervention of the muscle
latency time and biceps femoris RMS and the passive torque, peak torque and power
of the hamstring muscles. Results: The warm-up + stretching group had reduction of
muscle latency time. There was a reduction of RMS during passive torque evaluation
in stretching group. The RMS during isometric evaluation was reduced in all
experimental groups. The RMS during eccentric evaluation showed reduction in
control and warm-up + stretching groups. The passive torque and the eccentric peak
torque had no significant differences pre to post-intervention in any group. There was
reduction in isometric peak torque in all groups. Conclusion: The warm-up and
stretching, when applied in combination can reduce the muscle latency time;
stretching protocol promoted neural changes; the protocols used did not alter the
muscle viscoelastic properties / Avaliar os efeitos do aquecimento e do alongamento, isolados ou
associados, no desempenho isocin?tico e na atividade eletromiogr?fica do m?sculo
b?ceps femoral. Materiais e m?todos: Sessenta e quatro volunt?rios de ambos os
sexos, com idade m?dia de 23,1 ? 3,5 anos e ?ndice de massa corporal m?dio de
23,5 ? 2,5 Kg/m2 foram aleatoriamente distribu?dos em 4 grupos: controle,
aquecimento (bicicleta estacion?ria por 10 min.), alongamento (4 s?ries de 30s de
auto alongamento est?tico dos m?sculos isquiotibiais) e aquecimento +
alongamento. Todos foram submetidos ? avalia??o pr? e p?s-interven??o do tempo
de lat?ncia muscular e da RMS do m?sculo b?ceps femoral e do torque passivo, pico
de torque e pot?ncia dos m?sculos isquiotibiais. Resultados: No grupo aquecimento
+ alongamento houve redu??o do tempo de lat?ncia muscular. Houve redu??o da
RMS durante a avalia??o do torque passivo no grupo alongamento. A RMS durante
a avalia??o isom?trica foi reduzida em todos os grupos experimentais. A RMS na
avalia??o exc?ntrica apresentou redu??o nos grupos controle e aquecimento +
alongamento. O torque passivo e o pico de torque exc?ntrico n?o apresentaram
diferen?as significativas pr? e p?s-interven??o em nenhum grupo. Houve redu??o do
pico de torque isom?trico em todos os grupos. Conclus?o: O aquecimento e o
alongamento, quando aplicados em associa??o podem reduzir o tempo de lat?ncia
muscular; o protocolo de alongamento promoveu altera??es neurais; os protocolos
empregados n?o alteraram as propriedades viscoel?sticas do m?sculo
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/16688 |
| Date | 01 December 2010 |
| Creators | Amaro, Ivy Marques |
| Contributors | CPF:58440097468, http://lattes.cnpq.br/2238444079880883, Vieira, Wouber Herickson de Brito, CPF:97028169472, http://lattes.cnpq.br/7943769688281372, Salvini, Tania de F?tima, CPF:02167828802, http://lattes.cnpq.br/4391969032505723, Brasileiro, Jamilson Sim?es |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Fisioterapia, UFRN, BR, Movimento e Sa?de |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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