Effects of Different Concentric and Eccentric Muscle Fatigue Protocols on the Knee Joint Position Sense

Universidade do Porto

Status: Completed

Conditions: Healthy

Treatments: Other: Muscle fatigue Protocol

Study type: Interventional

Funder types: Other

Identifiers

NCT06331221

JSA_Fatigue_FADEUP

Details and patient eligibility

About

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.

Full 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.

Enrollment: 22 patients

Sex: Male

Ages: 18 to 30 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• 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.

Exclusion criteria

• 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).

Trial design

Primary purpose: Health Services Research

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: None (Open label)

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22 participants in 5 patient groups

Control Condition

No Intervention group

Description:

5-minute rest period.

Quadriceps_Concentric

Active Comparator group

Description:

40 consecutive maximal concentric contractions of quadriceps at 30º/s

Treatment:

Other: Muscle fatigue Protocol

Quadriceps_Eccentric

Active Comparator group

Description:

40 consecutive maximal eccentric contractions of quadriceps at 30°/s

Treatment:

Other: Muscle fatigue Protocol

Hamstrings_Concentric

Active Comparator group

Description:

30 consecutive maximal concentric contractions of hamstrings at 30º/s

Treatment:

Other: Muscle fatigue Protocol

Hamstrings_Eccentric

Active Comparator group

Description:

30 consecutive maximal eccentric contractions of the hamstrings at 30º/s

Treatment:

Other: Muscle fatigue Protocol