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Completed

NCT Number: NCT06691373

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

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

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Key information

Conditions

Healthy

Age range

18 year–30 year

Sex eligibility

Male

Study type

Interventional

Phase

Not applicable

Primary location

Escola Superior de Saúde Fernando Pessoa

Porto, Portugal

About this study

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.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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).

Treatment and study plan

Static Stretching

Other

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.

Primary outcomes

  1. Absolute angular error

    Time frame: 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

  2. Relative angular error

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

    The arithmetic difference between the target range and the range achieved

  3. Variable angular error

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

    The standard deviation of the 3 repositionings

Sponsors and collaborators

Lead sponsor

University Fernando Pessoa

Other

Registry information

Official study title

Acute Effects of Static Stretching on the Knee Joint Position Sense of Soccer Players: a Crossover Randomized Controlled Trial

Important dates

Study start
2023
Primary completion
2023
Study completion
2023
First posted
Nov 15, 2024
Registry last updated
Nov 15, 2024

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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