Stabilometric response during single-leg stance after lower limb muscle fatigue
Autor: | André Luiz Felix Rodacki, Carlos Alberto veiga Bruniera, Fernando R. P. G. Rogério |
---|---|
Jazyk: | angličtina |
Rok vydání: | 2013 |
Předmět: |
Male
medicine.medical_specialty Wilcoxon signed-rank test Physical Therapy Sports Therapy and Rehabilitation Single leg stance fadiga muscular rehabilitation Young Adult Lower limb muscle Center of pressure (terrestrial locomotion) reabilitacao Statistical significance Postural Balance Humans Medicine exercicio Orthopedics and Sports Medicine postural balance Orthodontics Leg exercise Muscle fatigue business.industry Rehabilitation lcsh:RM1-950 Resistance Training equilibrio postural lcsh:Therapeutics. Pharmacology Muscle Fatigue Physical therapy muscle fatigue business Body mass index |
Zdroj: | Brazilian Journal of Physical Therapy, Vol 17, Iss 5, Pp 464-469 (2013) Brazilian Journal of Physical Therapy, Volume: 17, Issue: 5, Pages: 464-469, Published: OCT 2013 Brazilian Journal of Physical Therapy v.17 n.5 2013 Brazilian Journal of Physical Therapy Associação Brasileira de Pesquisa e Pós-Graduação em Fisioterapia (ABRAPG-FT) instacron:ABRAPG-FT |
ISSN: | 1809-9246 |
Popis: | OBJECTIVE: This study sought to analyze the effect of muscle fatigue induced by active isotonic resistance training at a moderate intensity by measuring the knee extension motion during the stabilometric response in a single-leg stance among healthy university students who perform resistance training on a regular basis. METHOD: Eleven healthy university students were subjected to a one-repetition maximum (1RM) test. In addition, stabilometric assessment was performed before and after the intervention and consisted of a muscle fatiguing protocol, in which knee extension was selected as the fatiguing task. The Shapiro-Wilk test was used to investigate the normality of the data, and the Wilcoxon test was used to compare the stabilometric parameters before and after induction of muscle fatigue, at a significance level of p≤0.05. Descriptive statistics were used in the analysis of the volunteers' age, height, body mass, and body mass index (BMI). RESULTS: The sample population was 23.1±2.7 years of age, averaged 1.79.2±0.07 m in height and 75.6±8.0 Kg in weight, and had a BMI of 23.27±3.71 Kg.m-2. The volunteers performed exercises 3.36±1.12 days/week and achieved a load of 124.54±22.07 Kg on 1RM and 74.72±13.24 Kg on 60% 1RM. The center of pressure (CoP) oscillation on the mediolateral plane before and after fatigue induction was 2.89±0.89 mm and 4.09±0.59 mm, respectively, while the corresponding values on the anteroposterior plane were 2.5±2.2 mm and 4.09±2.26 mm, respectively. The CoP oscillation amplitude on the anteroposterior and mediolateral planes exhibited a significant difference before and after fatigue induction (p=0.04 and p=0.05, respectively). CONCLUSIONS: The present study showed that muscle fatigue affects postural control, particularly with the mediolateral and anteroposterior CoP excursion. OBJETIVO: Analisar o efeito da fadiga muscular induzida por exercício isotônico ativo-resistido de extensão de joelhos em intensidade moderada na resposta estabilométrica em apoio unipodal em universitários saudáveis, praticantes de treinamento resistido. MÉTODO: Para tanto, 11 jovens universitários saudáveis foram submetidos ao teste de 1-RM, avaliação estabilométrica pré e pós-intervenção e protocolo de indução à fadiga muscular utilizando a extensão do joelho como tarefa fatigante. Utilizou-se o teste de Shapiro-Wilk para verificação da normalidade dos dados e o teste de Wilcoxon para as comparações entre os parâmetros estabilométricos pré e pós-indução à fadiga muscular com nível de significância estipulado em p≤0,05, enquanto a estatística descritiva foi aplicada para caracterizar a idade, estatura, massa corporal e o índice de massa corporal (IMC). RESULTADOS: O grupo apresentou 23,1±2,7 anos; 1,79,2±0,07 m; 75,6±8,0 Kg; 23,27±3,71 Kg.m-2; 3,36±1,12 número de dias de atividade/semana; 1RM: 124,54± 22,07 kg; 60% de 1-RM: 74,72±13,24 Kg. A oscilação do centro de pressão (CP) médio-lateral pré e pós-fadiga, respectivamente, foi de 2,89±0,89 mm e 4,09±0,59 mm, enquanto a oscilação ântero-posterior foi de 2,5±2,2 mm e 4,09±2,26 mm. Encontrou-se diferença na largura de oscilação do CP nas direções ântero-posterior e médio-lateral entre as condições pré e pós-fadiga, p=0,04 e p=0,05, respectivamente. CONCLUSÕES: Portanto, o estudo demonstrou que a fadiga muscular altera o controle postural, especialmente na excursão médio-lateral e ântero-posterior do CP. |
Databáze: | OpenAIRE |
Externí odkaz: |