Effects of Different Concentric and Eccentric Muscle Fatigue Protocols on the Knee Joint Position Sense: a Randomized Controlled Crossover Trial
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 22
- 试验地点
- 1
- 主要终点
- Variable angular error
研究概览
简要总结
The aim of this study was to investigate the effects of different concentric and eccentric muscle fatigue protocols on the knee joint position sense of healthy individuals.
详细描述
A randomized controlled crossover trial will be conducted at a biomechanics laboratory with healthy males. All participants will perform with a washout period of 1 week: a control condition (5-minute rest) and 4 local muscle fatigue protocols (concentric of quadriceps; concentric of hamstrings; eccentric of quadriceps; eccentric of hamstrings) in an isokinetic dynamometer at 30º/s. Three maximum voluntary isometric contractions (MVIC) of quadriceps and hamstrings will also be assessed in the beginning of all conditions.
Knee joint position sense will be assessed before and immediately after the fatigue protocols/control condition, through active concentric and eccentric positionings/repositionings, in sitting and prone positions, to a target range of 45º of knee flexion in an isokinetic dynamometer. Surface electromyography electrodes will also be placed on the vastus lateralis and biceps femoris during all procedures.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Health Services Research
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 30 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •males aged between 18 and 30 years;
- •without current or previous knee pathology or surgery;
- •with a low or moderate physical activity level, according to the International Physical Activity Questionnaire;
- •normal Body Mass Index (under 24.9 kg/m2), according to the World Health Organization.
排除标准
- •those with cardiorespiratory, neurological or vestibular pathologies;
- •with positive knee integrity tests (anterior drawer, Lachman's test, posterior drawer; valgus and varus stress testes); and
- •those taking any medication that can affect motor control (sedatives, anxiolytics, antibiotics, analgesics, NSAIDs or myorelaxants).
研究组 & 干预措施
Quadriceps_Eccentric
40 consecutive maximal eccentric contractions of quadriceps at 30°/s
干预措施: Muscle fatigue Protocol (Other)
Hamstrings_Concentric
30 consecutive maximal concentric contractions of hamstrings at 30º/s
干预措施: Muscle fatigue Protocol (Other)
Hamstrings_Eccentric
30 consecutive maximal eccentric contractions of the hamstrings at 30º/s
干预措施: Muscle fatigue Protocol (Other)
Control Condition
5-minute rest period.
Quadriceps_Concentric
40 consecutive maximal concentric contractions of quadriceps at 30º/s
干预措施: Muscle fatigue Protocol (Other)
结局指标
主要结局
Variable angular error
时间窗: Change from Baseline (Before) to Immediately after interventions or control (After)
The standard deviation of the 3 repositionings
Absolute angular error
时间窗: Change from Baseline (Before) to Immediately after interventions or control (After)
The absolute value of the difference between the target range and the achieved range
Relative angular error
时间窗: Change from Baseline (Before) to Immediately after interventions or control (After)
The arithmetic difference between the target range and the range achieved
次要结局
未报告次要终点