Background: A better understanding about the relationship between trunk and hip muscles strength and core stability may improve evaluation and interventions proposed to improve core stability. Objectives: To investigate if trunk and hip muscles strength predict pelvic posterior rotation during the bridge test with unilateral knee extension. Methods: This is a cross-sectional study. Sixty-one healthy individuals of both sexes (age, 28 ± 6.4 years, weight, 66.5 ± 10.9 kg, height, 167 ± 9.5 cm) performed the bridge test with unilateral knee extension. The pelvic posterior rotation during the bridge test was obtained with two-dimensional video analysis. Isometric strength of the trunk extensors and rotators, and hip abductors, external and internal rotators and extensors were measured with a handheld dynamometer. Multiple linear regression analysis was performed to identify if the strength variables could explain the pelvic posterior rotation during the test. Results: Muscle strength predicted pelvic posterior rotation during the bridge test (r = 0.54; p = 0.003). Strength of the trunk rotators (p = 0.045) and hip internal rotators (p = 0.015) predicted reduced magnitude of pelvic posterior rotation during the bridge test, and strength of the hip extensors (p = 0.003) predicted increased magnitude of pelvic posterior rotation.
Rev Neurocienc 2012;20(3):372-378 original 372 RESUMOObjetivo. Verificar a influência da hidroterapia nas variáveis cardiorrespiratórias na gestação. Método. Foi realizado estudo experimental, com uma amostra composta por seis gestantes, com idades gestacionais entre a 22ª e a 29ª semana, idade cronológica 18 e 35 anos, em atendimento pré-natal. Foram excluídas da pesquisa praticantes de atividade física, gestantes em uso de medicamentos que pudessem interferir nas variáveis cardiovasculares e respiratórias e pacientes que apresentassem infecções cutâneas e gestações de risco. As participantes foram submetidas à avaliação fisioterapêutica, incluindo a mensuração das variáveis cardiorrespiratórias. Após a intervenção, realizou-se a reavaliação. O programa foi realizado com frequência de duas vezes por semana e duração de cinquenta minutos, durante três semanas, totalizando seis sessões, compreendendo cinco fases: alongamento, aquecimento, resistência, exercícios localizados e relaxamento. Resultados. Nas variáveis respiratórias, não encontramos alterações significativas nos valores de CVF, VEF1, PEmáx e FR. O PFE diminuiu de 333,33 mmHg para 295,16 mmHg em média (p<0,009), e a PImáx aumentou de 84,17 mmHg para 113,3 mmHg em média (p<0,012). Não houve diferença significativa nas variáveis cardíacas (PA e FC). Conclusão. Os resultados deste estudo sugerem que a hidroterapia pode aumentar a força muscular respiratória em gestantes e que o PFE sofre um declínio neste grupo. ABSTRACTObjective. In this work we investigate the behavior of cardiorespiratory variables during pregnancy after a hydrotherapy program. Method. An experimental study was performed with a sample of six pregnant women (age 18-35 years old) with gestational age between 22ª to 29ª week and doing prenatal appointments. Pregnants doing physical activities, taking medications that possible could interferer in cardiorespiratory variables and with cutaneuos diseases or risk pregnancies were excluded. All participants underwent physical therapy evaluation, including measurement of cardiorespiratory variables. After the intervention, there was a reassessment. The program was conducted in a frequency of twice a week, for fifty minutes for three weeks in six sessions. It was performed in five phases: stretching, heating, endurance, localized exercises and relaxation. Results. There were no significant differences in FVC, FEV1, MEP and RR. The PEFR decreased from mean 333,33mmHg to 295,16mmHg (p<0,009) and MIP increased from mean 84, 17 mmHg to 113mmHg ( p<0,012) There were no significant differences in cardiac variables (BP and HR). Conclusion. The results of this study suggest that hydrotherapy can increase respiratory muscle strength in pregnant. This study concluded that PEFR could decline in this study group.
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