No abstract

The intervention resulted in gains in measures of flexibility, and these gains had a positive impact on some parameters of muscular performance.

Background: Changes in activation of the trunk and hip extensor muscles can result in excessive stress on the lumbar spinal structures,

Although manual therapy for pain relief has been used as an adjunct in treatments for chronic low back pain (CLBP), there is still the belief that a single session of myofascial release would be effective. This study was a crossover clinical trial aimed to investigate whether a single session of a specific myofascial release technique reduces pain and disability in subjects with CLBP. 41 participants over 18 years old were randomly enrolled into 3 situations in a balanced and crossover manner: experimental, placebo, and control. The subjects underwent a single session of myofascial release on thoracolumbar fascia and the results were compared with the control and placebo groups. The outcomes, pain and functionality, were evaluated using the numerical pain rating scale (NPRS), pressure pain threshold (PPT), and Oswestry Disability Index (ODI). There were no effects between-tests, within-tests, nor for interaction of all the outcomes, i.e., NPRS (η 2 = 0.32, F = 0.48, p = 0.61), PPT (η2 = 0.73, F = 2.80, p = 0.06), ODI (η2 = 0.02, F = 0.02, p = 0.97). (4) Conclusion: A single trial of a thoracolumbar myofascial release technique was not enough to reduce pain intensity and disability in subjects with CLBP.

INTRODUÇÃO: A utilização de medidas confiáveis e práticas são necessárias para a tomada de decisões clínicas. O Teste da Queda do Navicular (TQN) fornece informações importantes na avaliação dos membros inferiores. Assim, os objetivos do presente estudo foram verificar a confiabilidade do TQN, conforme realizado na clínica, e analisar uma forma de minimizar a interferência do avaliador. MATERIAIS E MÉTODOS: Participaram do estudo 15 indivíduos (30 pés), selecionados por conveniência. O TQN foi aplicado de forma independente por dois examinadores experientes na realização do teste, o qual foi realizado apenas uma vez em cada pé, utilizando-se um paquímetro de plástico. Foi realizada uma análise descritiva dos dados. Para avaliação da confiabilidade interexaminadores, foi utilizado o índice de correlação intraclasse (ICC2,1) e a discrepância das medidas entre avaliadores foi analisada pelo erro típico da medição. RESULTADOS: A média e o desvio padrão para o primeiro e segundo examinador foram 8,7 ± 5,3 e 9,7 ± 4,7 milímetros. O teste apresentou excelente confiabilidade interexaminador (ICC = 0,93). O erro típico da medição foi 2,16 milímetros. CONCLUSÃO: Os procedimentos para minimizar a interferência do avaliador resultaram, contraditoriamente, em uma piora dos índices de confiabilidade. O TQN pode ser simplificado por meio do uso de instrumentos comuns na clínica e registrado a partir de uma única medida. Mesmo apresentando boa confiabilidade, o TQN apresenta um erro típico da medida, que deve ser levado em consideração para a tomada de decisão. Mudanças no teste, por vezes necessárias em um ambiente clínico, deverão ser analisadas quanto à conservação de suas propriedades.

Strength ratio between agonist and antagonist muscles provides significant information about muscular equilibrium, which helps to detect musculoskeletal changes and to guide preventive and rehabilitation programs. Isokinetic dynamometry provides reliable values for muscle torque and subsequently on the force ratio between knee flexors and extensors. However, this method is not clinically accessible. A possible alternative to evaluate this force is the One-Repetition Maximum test (One-Rep Max or just 1-RM), which is the most commonly used test for dynamic force assessment. However, there is no report in the literature of the use of 1-RM test for the quantification of knee flexors and extensors ratio. For this reason, the objective of this study was to use the 1-RM test to measure the ratio between knee extensors and flexors in young adults in order to find reference values. The studied sample was composed of 80 young adults (40 men and 40 women), mean age of 22.21 (±3.58) years with no musculoskeletal injuries. They were submitted to the following procedure: IPAQ-short version, weighing and prognostic of 1-RM, warm-up, and unilateral 1-RM test (at the flexor and extensor machine). After the test application, the data were analyzed and the mean values for the ratio between agonist/antagonist found were 52.34% (±9.72) for men and 43.19% (±5.82) for women (which were significantly different between groups). The values found in the present study may be used as reference for asymptomatic individuals with similar age.

No abstract

One of the approaches to evaluate injury prediction is the hamstrings-to-quadriceps peak torque conventional ratio (H:Q ratio). The gold standard for assessment of muscle strength in vivo is by isokinetic dynamometry; however, the one-repetition maximum strength test (1-RM) presents high correlation with isokinetic data. This study aimed to compare measures of H:Q ratio in young adults obtained by dynamometry and 1-RM testing. No significant differences were observed in the H:Q ratio when comparing 1-RM and dynamometry testing. However, there was a significant and strong correlation between the measurements obtained in the two tests. Despite this correlation, data from both tests are not equal as the H:Q ratio obtained from 1-RM test presents a systematic error. Nonetheless, the results can enhance the applicability of 1-RM test in clinical settings.