Flexibility in joint coordination remains unaffected by force and balance demands in young and old adults during simple sit-to-stand tasks

Christian Greve*, Tibor Hortobágyi, Raoul M. Bongers

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)
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Abstract

PurposeWe examined the possibility that old adults use flexibility in joint coordination as a compensatory mechanism for the age-related decline in muscle strength when performing the sit-to-stand (STS) task repeatedly under high force and balance demands.MethodYoung (n=14, 22.42.1) and old (n=12, 703.2) healthy adults performed repeated STSs under high and low force and balance demands. The balance demand was manipulated by reducing the base of support and the force demand by increasing body weight with a weight vest. Uncontrolled manifold analysis was used to quantify age differences in motor flexibility.Results p id= Par3 While there were age-typical differences in kinematic STS strategies, flexibility in joint coordination was independent of age and task difficulty during repeated STSs.Discussion p id=Par4That simple manipulations of force and balance demands did not affect flexibility in joint coordination in old and young adults suggests that motor flexibility acts as a compensatory mechanism only at the limits of available muscle strength and balance abilities during STS movements. Intervention studies should identify how changes in specific neuromuscular functions affect flexibility in joint coordination during activities of daily living such as STS.

Original languageEnglish
Pages (from-to)419-428
Number of pages10
JournalEuropean Journal of Applied Physiology
Volume119
Issue number2
Early online date24-Nov-2018
DOIs
Publication statusPublished - Feb-2019

Keywords

  • Motor control
  • Ageing
  • Motor flexibility
  • Coordination
  • Uncontrolled manifold
  • Sit-to-stand
  • AGE-RELATED-CHANGES
  • SIGNAL-DEPENDENT NOISE
  • MOTOR ABUNDANCE
  • FUNCTIONAL ABILITY
  • CHAIR
  • MOVEMENT
  • VARIABILITY
  • STRENGTH
  • STABILIZATION
  • BIOMECHANICS

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