Utilização do teste de 1-RM na mensuração da razão entre flexores e extensores de joelho em adultos jovens

Abstract

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.

Validity analysis of one-repetition maximum strength test for determining the hamstrings-to-quadriceps ratio

“…On the other hand, researchers have developed an easy and cost-effective 1-RM test protocol to obtain the H:Q ratio. Results showed values similar to those observed by dynamometry 8 . However, data should be used with caution since the H:Q ratio obtained by the 1-RM test will reflect the approximated values of the test performed by dynamometry, but not necessarily the same values.…”

“…Sample size was calculated based on the variability of 1 RM test 8 , with a confidence interval of 95%. The result of this calculation indicated that 14.51 participants would be an adequate sample size.…”

“…The 1-RM test has the potential to infer the maximum force produced by a muscle, which is important in establishing protocols for physical training or treatment. However, data acquired by 1-RM does not present the range of details provided by dynamometry, including agonist versus antagonist ratio, speed control, fatigue index, and generated work, among others 8 .…”

Método Tradicional vs. Série Pareada Agonista-Antagonista Para Membros Inferiores

“…Sobre o grupamento, e ponderando sobre pico de torque muscular, evidências denotam que os músculos extensores dos joelhos são capazes de produzir relativamente maior pico de torque do que os flexores dos joelhos, tendo em vista que no aparelho isocinético a produção de força dos músculos extensores do joelho é cerca de 25% a 40% maior em relação aos isquiotibiais (GRACE et al, 1984;TERRERI;GREVE;AMATUZZI, 2001). Tal afirmativa corrobora com as maiores cargas no teste de predição de 1-RM no exercício EXT, o que também foi observado em outros estudos (CARDOSO et al, 2011;AMÉRICO et al, 2011). No entanto, como não é possível comparar diretamente os exercícios FLEX e EXT no que tange o nRM, pois estes são realizados em equipamentos distintos, acreditase que alguns aspectos biomecânicos possam ter influído em nosso resultado.…”

Incidence of injuries in practical athletes of jiu-jitsu. A pysiotherapeutical vision on the bibliographic review.

“…Várias pesquisas são feitas para saber as causas das lesões esportivas, e com tais denunciam a incidência alarmante de sua ocorrência nos dias atuais, tornando fundamental a adequabilidade de ações para evitá-las (FONTANA 1999, CARPEGGIANI 2004, ABERNETHY 2007, FAIM 2009, OLIVEIRA 2010, SOUZA 2011, VIDOR 2011, MACHADO 2012, CARVALHO 2013, FERREIRA 20015 GRAÇAS 2017e ANDREATO 2017.…”