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Trunk-pelvis coordination during load carriage running.

Bernard X W Liew1, Susan Morris2, Kevin Netto2

  • 1School of Sport, Rehabilitation and Exercise Sciences, University of Essex, Colchester, Essex CO4 3SQ, United Kingdom.

Journal of Biomechanics
|August 19, 2020
PubMed
Summary
This summary is machine-generated.

Carrying a 20% bodyweight load while running significantly alters trunk-pelvis coordination, increasing variability across all movement planes. This impacts athletes who run with loads, affecting their biomechanics and stability.

Keywords:
CoordinationDynamical systems theoryLoad carriageMotor controlRunning

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Area of Science:

  • Biomechanics
  • Sports Science
  • Human Movement Analysis

Background:

  • Load carriage is common for athletes in various sports.
  • Understanding trunk-pelvis coordination during load carriage running is crucial for performance and injury prevention.
  • Previous research has not fully elucidated the specific effects of load carriage on trunk-pelvis coordination patterns and their variability.

Purpose of the Study:

  • To investigate the influence of carrying a 20% bodyweight load on trunk-pelvis coordination during running.
  • To quantify changes in specific coordination patterns (anti-phase, in-phase, trunk-only, pelvic-only) and coordination variability in different planes of motion.
  • To analyze the effects of load carriage on the stance phase of running biomechanics.

Main Methods:

  • Thirty healthy adults participated in the study.
  • Participants ran under two conditions: with a 20% bodyweight backpack and without load.
  • Vector coding was employed to analyze trunk-pelvis segmental coordination and its variability during the stance phase.
  • Mixed effects models were used to assess the impact of load, controlling for sex.

Main Results:

  • Load carriage increased trunk-only coordination in the sagittal plane and anti-phase coordination in the frontal plane.
  • Trunk-only phase coordination in axial rotation was reduced with load.
  • Coordination variability significantly increased in the flexion-extension, lateral flexion, and axial rotation planes.

Conclusions:

  • Load carriage substantially alters trunk-pelvis coordination strategies during running, leading to increased movement variability.
  • These findings have significant functional implications for athletes performing load carriage running, potentially affecting stability and efficiency.
  • Further research should explore the relationship between altered coordination variability and functional outcomes like center of mass displacement in load carriage running.