Support leg action can contribute to maximal instep soccer kick performance: an intervention study

Area of Science:

• Sports Science
• Biomechanics
• Kinesiology

Background:

• Maximal instep kick performance is crucial in soccer.
• Previous research has explored various techniques to enhance kicking power.
• The role of hip displacement in optimizing kicking mechanics requires further investigation.

Purpose of the Study:

• To assess if a Technique Refinement Intervention (INT) could improve maximal instep kick performance.
• To investigate the effect of increased vertical hip displacement during the kicking stride on kick performance.
• To identify the kinetic and kinematic mechanisms underlying changes in kicking performance.

Main Methods:

• Nine skilled soccer players performed 10 kicking trials before (NORM) and after (INT) the intervention.
• Ground reaction forces and 3D motion analysis data were collected.
• Paired t-tests and statistical parametric mapping were used to analyze kinetic and kinematic variables.

Main Results:

• Peak ball velocities were significantly higher after the intervention (26.3 vs 25.1 m/s).
• Vertical hip joint center displacement was significantly greater following the INT (0.041 vs 0.028 m).
• Kicking knee extension angular velocity increased significantly through ball contact post-intervention.

Conclusions:

• The Technique Refinement Intervention enhanced maximal instep kick performance.
• Increased vertical hip displacement is a key factor in improving kicking velocity.
• The intervention promotes greater passive power transfer to the kicking limb, optimizing performance.