Dynamics of submaximal effort soccer instep kicking

Area of Science:

• Biomechanics
• Sports Science
• Kinesiology

Background:

• Controlling ball velocity is crucial in soccer.
• Limited research exists on the biomechanics of kicking at varying effort levels.

Purpose of the Study:

• To analyze the segmental dynamics of the kicking leg during submaximal soccer instep kicks.
• To understand how players adjust technique to control ball velocity at different effort intensities.

Main Methods:

• Motion capture system recorded kicking leg motion of 8 university soccer players.
• Data collected at 50%, 75%, and 100% maximal effort levels.
• Ball velocity measured using photocells.

Main Results:

• Significant differences in angular impulses and joint moments were observed between effort levels.
• Players adjusted proximal and distal leg segment dynamics.
• Lower effort kicks involved medial ball impact and less upright foot orientation.

Conclusions:

• Soccer players utilize a proximal-to-distal segmental coordination strategy to control kicking dynamics.
• Ball impact location and foot orientation are key for fine-tuning resultant ball velocity at various effort levels.