Skill level and the free moment during a pistol aiming task

Area of Science:

• Biomechanics
• Sports Science
• Motor Control

Background:

• Accurate pistol aiming requires precise control of body movements.
• Understanding the relationship between body dynamics and shooting performance is crucial for skill development.

Purpose of the Study:

• To investigate the transversal body rotation and its relation to horizontal movement in expert and novice pistol shooters.
• To identify biomechanical differences in postural control strategies between skill levels during a pistol aiming task.

Main Methods:

• Participants performed a 30-second pistol aiming task on a force plate.
• Measured body movement variability using the free moment (FM) and center of pressure (CoP).
• Analyzed correlations between FM and CoP in anterior-posterior and medio-lateral directions.

Main Results:

• Novice shooters displayed significantly greater free moment (FM) variability than expert shooters.
• Expert shooters showed tight coupling between FM and CoP in both anterior-posterior and medio-lateral directions.
• Novice shooters exhibited strong coupling only in the anterior-posterior direction.

Conclusions:

• The free moment (FM) is a critical factor for accurate pistol aiming.
• Skill level influences postural strategies, with experts demonstrating superior control over transversal and horizontal body motion.
• Differentiated body motion control is key to achieving success in precision shooting tasks.