Effects of Different Concentric and Eccentric Muscle Fatigue Protocols on the Knee Joint Position Sense
- Conditions
- Healthy
- Registration Number
- NCT06331221
- Lead Sponsor
- Universidade do Porto
- Brief Summary
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.
- Detailed Description
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.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- Male
- Target Recruitment
- 22
- 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.
- 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).
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- CROSSOVER
- Primary Outcome Measures
Name Time Method Relative angular error Change from Baseline (Before) to Immediately after interventions or control (After) The arithmetic difference between the target range and the range achieved
Variable angular error Change from Baseline (Before) to Immediately after interventions or control (After) The standard deviation of the 3 repositionings
Absolute angular error 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
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (1)
Faculdade de Desporto, Universidade do Porto
🇵🇹Porto, Portugal
Faculdade de Desporto, Universidade do Porto🇵🇹Porto, Portugal