The aim of this study isto investigate the influence of acute static stretching on the ankle joint position sense of soccer players.
This crossover randomized controlled trial will include semi-professional soccer players. All participants will perform 3 conditions: two experimental conditions, of static stretching of the gastrocnemius and tibialis anterior muscles, for 30 seconds or 90 seconds; and a control condition (rest). Ankle joint position sense of the dominant limb will be assessed before and immediately after the conditions for the range of 20º of plantar flexion by active repositioning, and using a video camera. Absolute, relative and variable angular errors will be calculated.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
HEALTH_SERVICES_RESEARCH
Masking
NONE
Enrollment
19
The static stretching protocol will include the following muscle groups of the dominant lower limb: * Gastrocnemius - Participants will assume a bipedal position facing a wall. Then, the leg that is not being stretched will be placed forward, with the knee in semi-flexion, and the leg that is being stretched, behind, with the knee in full extension. Instructions will be given in order to keep the calcaneus on the floor; * Tibialis anterior - Participants will be facing a wall, with the entire foot in touch with the ground and toes pointing forward. Then, they will secure themselves to a handrail and project the hips back. These stretchings will be held in a position where the participants refer discomfort, and will be maintained for 30 seconds or 90 seconds according to the condition.
Escola Superior de Saúde Fernando Pessoa
Porto, Portugal
Absolute angular error
The absolute value of the difference between the target range and the achieved range
Time frame: Change from Baseline (Before) to Immediately after interventions or control (After)
Relative angular error
The arithmetic difference between the target range and the range achieved
Time frame: Change from Baseline (Before) to Immediately after interventions or control (After)
Variable angular error
The standard deviation of the 3 repositionings
Time frame: Change from Baseline (Before) to Immediately after interventions or control (After)
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