Healthy
Conditions
Keywords
Static Stretching, Joint Position Sense, Proprioception, Knee, Soccer
Brief summary
The aim of this study was to investigate the acute effects of static stretching on the knee joint-position sense of soccer players.
Detailed description
This crossover randomized controlled trial included male soccer players. All participants performed 3 conditions: two experimental conditions, of static stretching of the quadriceps and hamstrings muscles, for 30 or 90 seconds; and a control condition (rest). Knee joint-position sense of the dominant limb was assessed before and immediately after the conditions for the range of 45º of knee flexion by active repositioning, using a video camera. Absolute, relative and variable angular errors were calculated.
Interventions
OTHERStatic Stretching
Static stretching of the quadriceps and hamstrings which was performed in the dominant limb, and held in a position where the participants referred discomfort: * Quadriceps - participants were in the standing position, with one hand holding the back of a chair to maintain the balance, and were instructed to pull the ankle of the lower limb to be stretched, pressing the heel towards the buttocks and, at the same time, extending the thigh; * Hamstrings - participants were also in the standing position, with the heel resting on a chair. They were then instructed to lean the body forward keeping the spine erect and the pelvis in anteversion, to obtain a stretch over the knee and hip.
Sponsors
University Fernando Pessoa
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
HEALTH_SERVICES_RESEARCH
Masking
NONE
Eligibility
Sex/Gender
MALE
Age
18 Years to 30 Years
Healthy volunteers
Yes
Inclusion criteria
* male soccer players * aged between 18 and 30 years old * with normal knee range of motion * without history of lower limb injuries in the last 6 months
Exclusion criteria
* history of knee surgery * with cardiorespiratory, neurological or vestibular diseases * with positive knee integrity tests (anterior drawer, posterior drawer, Lachman test and valgus and varus stress tests) * using drugs that could affect the central nervous system, balance, or motor control (sedatives, anxiolytics, analgesics, NSAIDs, muscle relaxants, or antibiotics).
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Absolute angular error | Change from Baseline (Pre) to Immediately after interventions or control (Post) | The absolute value of the difference between the target range and the achieved range |
| Relative angular error | Change from Baseline (Pre) to Immediately after interventions or control (Post) | The arithmetic difference between the target range and the range achieved |
| Variable angular error | Change from Baseline (Pre) to Immediately after interventions or control (Post) | The standard deviation of the 3 repositionings |
Countries
Portugal
Outcome results
None listed