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Previous issue date: 2011-12-07 / Objective: To evaluate the effect of different resting periods, after induced muscle
fatigue, in the quadriceps femoris neuromuscular performance, in healthy subjects.
Methods: Sixty-four volunteers, of both genders, with an average of 21,8 ? 1,7 years
and mean body mass index of 24,2 ? 3,7 Kg/m2 were randomly assigned into 4
groups: control group (was not induced fatigue); Experimental Group 1 (Exp. 1 1
minute of rest after fatigue); Experimental Group 3 (Exp. 3 3 minutes of rest after
fatigue) and Experimental Group 5 (Exp. 5 5 minutes of rest after fatigue). The
subjects were evaluated to the knee?s joint position sense (JPS), followed by 5
flexion-extension knee concentric isokinetic contractions at 60?/s, with concomitant
recording of median frequency (Fmed) of rectus femoris (RF), vastus lateralis (VL)
and vastus medialis (VM). Then they underwent a muscle fatigue protocol (30
flexion-extension knee concentric contractions at 60?/s) and were reevaluated on the
isokinetic performance, Fmed and JPS. Blood lactate levels were measured before
initial assessment, immediately after the fatigue protocol and 5 minutes after the end
of the rest period. Results: The adoption of 3 minutes of rest was sufficient to restore
the initial conditions for the peak torque normalized by body weight and the VL and
VM Fmed. The joint position sense returned to its initial values with 1 minute rest.
The lactate concentration remained high regardless of the adopted rest period.
Conclusion: The use of 3-minute rest period is sufficient for the reestablishment of
the neuromuscular parameters to the pre fatigue values. / Objetivo: Avaliar o efeito de diferentes tempos de repouso, ap?s fadiga muscular
induzida, no desempenho neuromuscular do quadr?ceps femoral, em indiv?duos
saud?veis. M?todos: Sessenta e quatro volunt?rios, de ambos os g?neros, com
m?dia de 21,8 ? 1,7 anos e ?ndice de massa corp?rea m?dio de 24,2 ? 3,7 Kg/m2
foram distribu?dos aleatoriamente em 4 grupos: Grupo Controle (n?o foi induzida
fadiga); Grupo Experimental 1 (Exp. 1 1 minuto de repouso ap?s fadiga); Grupo
Experimental 3 (Exp. 3 3 minutos de repouso ap?s fadiga); e Grupo Experimental 5
(Exp. 5 5 minutos de repouso ap?s fadiga). Os sujeitos realizaram uma avalia??o
que consistiu na determina??o do senso de posi??o articular (SPA) do joelho,
seguida de 5 contra??es isocin?ticas conc?ntricas de flexo-extens?o do joelho a
60?/s, com concomitante registro da frequ?ncia mediana (Fmed) dos m?sculos reto
femoral (RF), vasto lateral (VL) e vasto medial (VM). Em seguida, foram submetidos
a um protocolo de fadiga muscular (30 contra??es conc?ntricas de flexo-extens?o do
joelho a 60?/s) e reavaliados quanto ao desempenho isocin?tico, Fmed e SPA. Os
n?veis de lactato sangu?neo foram mensurados antes da avalia??o inicial,
imediatamente ap?s o protocolo de fadiga e 5 minutos ap?s o t?rmino do tempo de
repouso. Resultados: A ado??o de 3 minutos de repouso foi suficiente para
restabelecimento das condi??es iniciais para o pico de torque normalizado pelo peso
corporal e para a Fmed do VL e VM. O senso de posi??o articular atingiu seus
valores iniciais com 1 minuto de repouso. A concentra??o de lactato permaneceu
alta independente do repouso adotado. Conclus?o: A ado??o de 3 minutos de
repouso ? suficiente para o restabelecimento dos par?metros neuromusculares para
os valores pr? fadiga.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/16709 |
| Date | 07 December 2011 |
| Creators | Locks Neto, Francisco |
| Contributors | CPF:58440097468, http://lattes.cnpq.br/2238444079880883, Oliveira, Ana Beatriz de, CPF:21445866838, http://lattes.cnpq.br/1049547759186556, Ferreira, Jos? Jamacy Almeida, CPF:24372110472, http://lattes.cnpq.br/7942403520160630, 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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