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Inter- and intra-limb coordination during initial sprint acceleration.

Byron J Donaldson¹, Neil E Bezodis², Helen Bayne¹

¹Sport, Exercise Medicine and Lifestyle Institute (SEMLI) and Department of Physiology, Faculty of Health Sciences, University of Pretoria, Pretoria, 0002, South Africa.

|September 26, 2022

Summary

This summary is machine-generated.

Sprint acceleration involves coordinated limb movements. This study reveals consistent patterns in thigh, trunk, and shank coordination, with distinct changes between steps and variations in inter-limb coordination during flight and stance phases.

Keywords:

Dynamical systems Kinematics Segment dominancy Sprinting Technique

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Area of Science:

Biomechanics
Human Movement Science
Sports Science

Background:

Understanding segment coordination is crucial for analyzing complex movements like sprinting.
Initial sprint acceleration relies on effective joint and segment rotations for center of mass translation.

Purpose of the Study:

To describe inter- and intra-limb coordination during initial sprint acceleration.
To assess step-to-step changes and between-individual variations in coordination.
To analyze coordination patterns in highly trained male and female sprinters.

Main Methods:

Kinematic data were collected for the first four steps of a 20m sprint using inertial measurement units.
Thigh-thigh, trunk-shank, and shank-foot coordination were analyzed using modified vector coding and segment dominancy.
Twenty-one elite sprinters (male and female) participated in the study.

Main Results:

Common coordination patterns were observed across sexes and performance levels, indicating strong task constraints.
Inter-limb thigh coordination showed the most variation during early flight.
Trunk-shank and shank-foot coordination varied most in late flight and late stance, with step 1 showing unique coordination.

Conclusions:

Sprint acceleration exhibits consistent, task-constrained coordination patterns across different sprinters.
Inter-limb coordination is predominantly anti-phase and trailing leg dominant.
Ankle motion during flight and late stance is primarily influenced by the foot segment.