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Motor variability regulation analysis in trampolinists.

Mathieu Bourgeois1, Eve Charbonneau1, Craig Turner1

  • 1Laboratoire de Simulation et Modélisation du Mouvement, Université de Montréal, Montréal, QC, Canada.

Journal of Biomechanics
|January 25, 2025
PubMed
Summary

Trampolinists adjust limb movements to stabilize body orientation during flips, reducing landing variability. Increased twist rotations correlate with greater variability accumulation in aerial skills.

Keywords:
Aerial acrobaticsMotor controlSensory acquisitionTwisting somersaultsVariability regulation

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Area of Science:

  • Sports Science
  • Biomechanics
  • Human Movement Analysis

Background:

  • Optimizing body orientation in trampolining is crucial for injury prevention and performance.
  • Motor variability necessitates anticipatory inflight corrections for body orientation control before landing.

Purpose of the Study:

  • Investigate the evolution of body and limb position variability during trampolining acrobatics.
  • Examine the relationship between acrobatic difficulty and variability accumulation.
  • Identify links between body orientation variability and gaze orientation.

Main Methods:

  • Seventeen trampolinists performed up to 13 different acrobatics.
  • Kinematics and gaze data captured using inertial measurement units and eye tracking.
  • Inter-trial variability of pelvis orientation and limb positions analyzed at takeoff, 75% twist completion, and landing.

Main Results:

  • Pelvis orientation variability increased significantly from takeoff to 75% twist completion, then decreased towards landing.
  • Limb variability initially decreased, then significantly increased, suggesting kinematic adaptations for orientation control.
  • Higher twist rotations correlated with greater variability accumulation at 75% twist completion.
  • Qualitative observation linked reduced body orientation variability to visual focus on the trampoline bed before landing.

Conclusions:

  • Trampolinists employ limb kinematic adjustments to regulate body orientation, particularly before landing.
  • Acrobatic complexity, specifically the number of twists, influences variability accumulation during flight.
  • Gaze control may play a role in managing body orientation variability for successful landings.