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Cognitive Function and Functional Mobility Predict Exercise Adherence in Older Adults Who Fall.

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Area of Science:

  • Gerontology
  • Rehabilitation Science
  • Cognitive Neuroscience

Background:

  • Falls are a major risk for older adults, leading to injury and reduced independence.
  • Strength and balance exercises, like the Otago Exercise Program (OEP), are effective in preventing falls.
  • However, adherence to home-based exercise programs remains a significant challenge.

Purpose of the Study:

  • To identify baseline cognitive and mobility factors that predict adherence to the OEP.
  • To inform strategies for improving exercise adherence in fall prevention programs.

Main Methods:

  • Secondary analysis of a randomized clinical trial involving 172 participants assigned to the OEP.
  • Adherence measured as a percentage of prescribed exercise sessions completed.
  • Cognitive function assessed via Trail Making Tests, Digit Symbol Substitution Test, Verbal Digits Forward/Backward tests, and Stroop Color-Word Test.
  • Mobility evaluated using the Short Performance Physical Battery (SPPB) and Timed Up and Go (TUG) test.
  • General estimation equations used to identify predictors of OEP adherence.

Main Results:

  • Better executive function, specifically set-shifting ability, predicted greater OEP adherence (p=0.018).
  • Poorer performance on the Timed Up and Go (TUG) test at baseline predicted better OEP adherence (p<0.001).
  • Higher attention and short-term memory predicted lower OEP adherence (p<0.05).
  • Response inhibition, processing speed, working memory, and SPPB scores were not significantly associated with adherence.

Conclusions:

  • Specific cognitive functions (set-shifting, attention, short-term memory) and functional mobility (TUG) are significant predictors of adherence to the OEP.
  • The findings highlight the complex relationship between cognitive/mobility status and exercise adherence.
  • Further research is needed to elucidate the mechanisms underlying these predictive relationships, particularly the counterintuitive findings for attention/memory and mobility.