Acute Effects of Static Stretching on the Knee Joint Position Sense of Soccer Players

University Fernando Pessoa17 enrolled

Overview

The aim of this study was to investigate the acute effects of static stretching on the knee joint-position sense of soccer players.

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.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

HEALTH_SERVICES_RESEARCH

Masking

NONE

Enrollment

Conditions

Healthy

Interventions

Static StretchingOTHER

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.

Eligibility

Sex: MALEMin age: 18 YearsMax age: 30 YearsHealthy volunteers:

Medical Language ↔ Plain English

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).

Locations (1)

Escola Superior de Saúde Fernando Pessoa

Porto, Portugal

Outcomes

Primary Outcomes

Absolute angular error

The absolute value of the difference between the target range and the achieved range

Time frame: Change from Baseline (Pre) to Immediately after interventions or control (Post)

Relative angular error

The arithmetic difference between the target range and the range achieved

Time frame: Change from Baseline (Pre) to Immediately after interventions or control (Post)

Variable angular error

The standard deviation of the 3 repositionings

Time frame: Change from Baseline (Pre) to Immediately after interventions or control (Post)

Data from ClinicalTrials.gov

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