Reliability of the Passive Properties of the Calf Muscles in Healthy Subjects Assessed Using Isokinetic Device
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 16
- 试验地点
- 2
- 主要终点
- Change from Baseline stiffness parameters at 15 days to assess the reproducibility of stiffness parameters
研究概览
简要总结
The investigators designed this study to determine the test-retest reliability of the viscoelastic passive properties of the calf muscles assessed using isokinetic device in flexed and extended knee position. The second objective is to determine the clinical viability of the parameters using the coefficient of repeatability and to investigate the individual characteristics associated with increased calf stiffness or altered viscoelasticity
详细描述
Recordings using an isokinetic dynamometer make it possible to quantify the resisting force during passive muscle stretch for a constant speed movement in dorsal flexion (flexion) and its release in plantar flexion (extension). The surface electromyography (EMG) makes it possible to measure voluntary contraction and the movement is considered passive if the corrected and normalized EMG signal, using root-mean-square (RMS), is less than 10% RMS during the Maximal Voluntary Muscle Contraction (MVMC).
Stiffness is calculated from the slope of the rise of the curve during the passive dorsiflexion phase of the joint. The elastic potential energy can be measured and corresponds to the area under the curve during elongation.
During the plantar flexion return phase, there is a hysteresis phenomenon resulting in behavior that differs from the curve. This difference between the two curves corresponds to the behavior related to viscoelastic relaxation. Viscoelasticity has a thixotropic behavior, i.e. it varies over time, for example, with heating. These parameters have been studied together or separately to evaluate the effect of age or stretching on the passive mechanical properties of the calf.
However, the test-retest reliability of the viscoelastic passive properties of the calf muscles assessed using isokinetic device has not been demonstrated.
The investigators designed this study to determine the test-retest reliability of the viscoelastic passive properties of the calf muscles assessed using isokinetic device in flexed and extended knee position. The second objective is to determine the clinical viability of the parameters using the coefficient of repeatability and to investigate the individual characteristics associated with increased calf stiffness or altered viscoelasticity
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Diagnostic
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 45 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Patient who signed the research information form
- •Patient affiliated to a social security system
- •An active patient, under 45 years of age, who participates in at least 4 hours of physical activity per week
排除标准
- •Individuals unable to perform an isokinetic muscle testing
- •Individuals with a current or recent lower limb injury with time loss from sport participation within the previous month.
结局指标
主要结局
Change from Baseline stiffness parameters at 15 days to assess the reproducibility of stiffness parameters
时间窗: Two evaluations on both dominant and non dominant knees: one evaluation at the first visit, and a second evaluation at the second visit at 15 days after the first visit
Change from Baseline stiffness parameters at 15 days, measurement of passive peak torque at 0 and 10° and slope of curve during the passive ankle flexion using an isokinetic device
Change from Baseline viscoelastic parameters at 15 days to assess the reproducibility of viscoelastic parameters
时间窗: Two evaluations on both dominant and non dominant knees: one evaluation at the first visit, and a second evaluation at the second visit at 15 days after the first visit
Change from Baseline viscoelasticity parameters at 15 days, measurement of hysterisis (AUC release/AUC storage) during the passive ankle flexion/extension using an isokinetic device
次要结局
- Patient characteristics(One evaluation only, at the first visit after inclusion)
- Physical characteristics, popliteal angle(One evaluation only, at the first visit after inclusion)
- Physical characteristics, Calf Circumference(One evaluationsonly, at the first visit after inclusion (T1))
- Physical characteristics, ROM(One evaluation only, at the first visit after inclusion)
- Physical characteristics, Fingertip-to-Floor (FTF) Test(One evaluation only, at the first visit after inclusion)