Isokinetic Dynamometry in Elderly Women Undergoing Total Knee Arthroplasty: A Comparative Study

Aquino, Marcos de Amorim

doi:10.1590/s1807-59322006000300006

Cited by 25 publications

(13 citation statements)

References 25 publications

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“…It has been recently used to analyze the evolution of total knee arthroplasty of elderly patients. 24 The H/Q ratio shows the equilibrium condition among the forces which act on the knee. There is evidence that a H/Q ratio below 60% is related to ACL injury.…”

Section: Discussionmentioning

confidence: 99%

Isokinetic Torque Peak and Hamstrings/Quadriceps Ratios in Endurance Athletes With Anterior Cruciate Ligament Laxity

Portes

Botelho

et al. 2007

Clinics

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VG, Pinto S de S. Isokinetic torque peak and hamstrings/quadriceps ratios in endurance athletes with anterior cruciate ligament laxity. Clinics. 2007;62(2):127-32. PURPOSE:To evaluate torque and the hamstring/quadriceps ratio of the knee of athletes with and without anterior cruciate ligament laxity. METHODS: Twenty-eight male athletes, 19 without anterior cruciate ligament laxity and 9 with anterior cruciate ligament laxity, were evaluated with an isokinetic machine model Cybex 770. The peak torque of quadriceps and hamstrings was compared, and the hamstring/quadriceps ratio on the constant angular speed of 60º per second were also compared. RESULTS: In athletes with anterior cruciate ligament laxity, the peak torque values (right and left knees) of flexors (120 ± 15 and 116 ± 15 Nm) and of extensors (218 ± 36 Nm and 207 ± 26 Nm) were not different than those of athletes without laxity (109 ± 21 Nm and 111 ± 22 Nm; 191 ± 5 Nm and 188 ± 35 Nm). The hamstring/quadriceps ratio of athletes with laxity (right: 57 ± 6% and left: 56 ± 8%) did not differ from those without anterior cruciate ligament laxity (right: 58 ± 9% and left: 58 ± 7%). CONCLUSIONS:The anterior cruciate ligament laxity of long distances running athletes did not significantly alter the peak torque of flexors and of extensors or the hamstring/quadriceps ratio. KEYWORDS: Isokinetic torque. Knee. Anterior cruciate ligament. Laxity. Athletes. INTRODUCTIONTorque is the rotational effect of force generated by a single muscle or group of muscles in relation to the considered joint.1 Because the term force is basically a linear entity, in this study when referring to muscle strength, the term torque was conventionally used. The term strength refers to the tension that a muscle or group of muscles exerts against a determined resistance.2 The unbalanced condition of strength and the hypotrophy of the flexor and extensor muscles of the knee joint are muscle malfunctioncausing factors that alter joint stability, predisposing athletes to injury. [3][4][5] The muscular torque of the quadriceps and hamstrings, as well as their torque ratio (H/Q), is usually evaluated by the isokinetic test. 6 The H/Q ratio is used both clinically and in the laboratory as an indicator of the strength balance between the knee joint muscles. 7 The H/Q ratio is conventionally calculated by dividing the maximum values of the flexion by the maximum values of the extension of the knee joint in angled speed and determined contraction modes. 8It is difficult to determine whether the hamstring weakness, the quadriceps weakness, or both are related to the knee injuries, or if muscle weakness is a consequence of the injury.9 Evidence suggests that highly developed quadriceps muscles contribute to a decrease of the co-activation of the hamstring antagonists, thus increasing the susceptibility for anterior cruciate ligament injury. The anterior cruciate ligament (ACL) is the primary ligament that limits the anterior translation of the tibia in relation to the femur. Subjects with ACL injury de...

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Section: Discussionmentioning

confidence: 99%

Isokinetic Torque Peak and Hamstrings/Quadriceps Ratios in Endurance Athletes With Anterior Cruciate Ligament Laxity

Portes

Botelho

et al. 2007

Clinics

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“…A dinamometria isocinética é um dos métodos mais acurados para avaliação muscular, oferecendo informações sobre a dinâmica e desempenho dos músculos testados 24 . As mensurações são feitas por um dinamômetro computadorizado que permite arcos de movimento em uma velocidade angular constante pré-determinada 25 .…”

Section: Introductionunclassified

Efeitos da crioterapia e facilitação neuromuscular proprioceptiva sobre a força muscular nas musculaturas flexora e extensora de joelho

Mortari¹,

Mânica²,

Pimentel

2009

Fisioter. Pesqui.

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As musculaturas flexora e extensora do joelho são freqüentemente lesionadas devido a um desequilíbrio entre esses grupos. Recursos térmicos, como a crioterapia, e técnicas de alongamento, como a técnica mantém-relaxa da facilitação neuromuscular proprioceptiva (FNP), influenciam a flexibilidade e força muscular, proporcionando maior homogeneidade entre essas musculaturas e diminuindo a incidência de lesões. Este estudo objetivou verificar os efeitos da crioterapia e da FNP sobre a força das musculaturas flexora e extensora de joelho. A amostra foi composta por 18 mulheres com idade entre 18 e 24 anos, não-praticantes de atividade física regular, divididas em dois grupos: um submetido a crioterapia e o outro à técnica mantém-relaxa da FNP. Antes e após uma sessão de aplicação das técnicas foi feita avaliação isocinética. A aplicação da técnica mantém-relaxa provocou aumento da força em ambas as musculaturas em ambos os membros, atingindo nível de significância nos flexores do membro inferior direito (p=0,04). A crioterapia diminuiu a força dos extensores e exerceu efeito contrário sobre os flexores, tendo gerado aumento significativo nos flexores do membro inferior direito (p=0,035). Quando comparadas as técnicas, a técnica mantém-relaxa gerou maiores valores de pico de torque, principalmente nos extensores do membro inferior esquerdo (p=0,042). Conclui-se que a técnica mantém-relaxa da FNP gerou maiores valores no pico de torque em relação à crioterapia.

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“…12 Patients' age was limited, because comparing patients older than 75 years and younger than 55 years could show a significant strength difference due to age. 13,14 In the study by Tria and Coon 15 patients' age ranged from 51 to 84 years (mean: 67 years), and, in the study by Berger et al 12 age ranged from 50 to 79 years (mean: 68 years). In our study, a difference was found in the mean values for age, but the statistical analysis showed no correlation between isokinetic dynamometry parameters and age.…”

Section: Discussionmentioning

confidence: 96%

“…As we studied aged women not practicing sports and with knee osteoarthrosis, we chose not to assess dominant and non-dominant sides. 13,14 The kind of anesthesia and pain relief was standardized in order to enable patients to start rehabilitation protocol with the same status.…”

Section: Discussionmentioning

confidence: 99%

Avaliação isocinética em pacientes submetidos à artroplastia total de joelho

Demange¹,

Camanho²,

Pécora³

et al. 2009

Acta ortop. bras.

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Objective: In total knee arthroplasty, the minimally-invasive approach has been claimed to enable earlier rehabilitation because it spares the femoral quadriceps muscle. To check the influence of preserving the extensor apparatus during surgery, the strength of knee extension and flexion muscles was evaluated in patients submitted to total knee arthroplasty with different approaches. Materials and Methods: The values of maximum torque and total work obtained by isokinetic dynamometry six months after surgery were compared for the Minimally invasive surgery group constituted of 12 individuals

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Isokinetic Dynamometry in Elderly Women Undergoing Total Knee Arthroplasty: A Comparative Study

Cited by 25 publications

References 25 publications

Isokinetic Torque Peak and Hamstrings/Quadriceps Ratios in Endurance Athletes With Anterior Cruciate Ligament Laxity

Isokinetic Torque Peak and Hamstrings/Quadriceps Ratios in Endurance Athletes With Anterior Cruciate Ligament Laxity

Efeitos da crioterapia e facilitação neuromuscular proprioceptiva sobre a força muscular nas musculaturas flexora e extensora de joelho

Avaliação isocinética em pacientes submetidos à artroplastia total de joelho

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