Constant low-to-moderate mechanical asymmetries during 800-m track running

Area of Science:

• Biomechanics
• Sports Science
• Human Movement Analysis

Background:

• Gait asymmetry modifications during self-paced running are not well-documented, especially concerning horizontal ground reaction forces.
• Understanding these asymmetries is crucial for analyzing running mechanics and potential injury risks.

Purpose of the Study:

• To determine the magnitude and range of gait asymmetries during an 800-meter self-paced track run.
• To investigate if self-paced running at varying distances influences biomechanical variables related to asymmetry.

Main Methods:

• Eighteen students completed an 800m self-paced run on an indoor track.
• Vertical and horizontal ground reaction forces were measured using a force platform system.
• Symmetry Angle (SA) formula was used to evaluate nine biomechanical variables, including contact time, braking/push-off phases, peak forces, and impulses.

Main Results:

• No significant influence of distance interval on Symmetry Angle (SA) scores was observed for any biomechanical variable.
• SA scores for contact time, peak vertical forces, and vertical impulse were low (approximately 1%-2%).
• SA scores for braking/push-off phases, peak forces, and impulses were higher but still within a narrow range (approximately 3%-8%).

Conclusions:

• Running an 800m self-paced distance does not induce significant changes in gait asymmetry in physical education students.
• The self-paced 800m run did not impose greater mechanical constraints on one side of the body.
• Data collection for gait analysis during 800m track running can be simplified by focusing on one leg's mechanics.