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Related Experiment Videos

Gait transitions are not dependent on changes in intralimb coordination variability.

James C Kao1, Shannon D Robertson Ringenbach, Philip E Martin

  • 1Department of Human Performance, San Jose State University, San Jose, CA, USA.

Journal of Motor Behavior
|July 23, 2003
PubMed
Summary

The HKB model

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Area of Science:

  • Motor control and coordination.
  • Biomechanics of human locomotion.

Background:

  • The HKB model, applied to upper extremity movements, predicts changes in relative phase variability during transitions.
  • Previous research focused on upper limb stationary tasks.

Purpose of the Study:

  • To test the HKB model's predictions for lower extremity intralimb coordination during gait transitions.
  • To investigate walk-to-run and run-to-walk transitions on a treadmill.

Main Methods:

  • 10 participants performed continuous treadmill walk-to-run and run-to-walk trials.
  • Measured standard deviation of knee-ankle and hip-ankle relative phase.
  • Analyzed variability before and after gait transitions.

Main Results:

  • No increase in relative phase variability was observed before walk-to-run or run-to-walk transitions.
  • No decrease in knee-ankle relative phase variability was found after transitions.
  • Results did not support HKB model's variability predictions for lower limb gait transitions.

Conclusions:

  • The HKB model's predictions regarding relative phase variability may not apply to lower extremity intralimb coordination during gait transitions.
  • Further research is needed to understand coordination dynamics in human locomotion.
  • This study highlights limitations in applying existing coordination models to new movement contexts.

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