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Differences in grip force control between young and late middle-aged adults.

Lianrong Zheng1,2,3, Kunyang Li1,2,3, Qian Wang1,2,3

  • 1Department of Biomedical Engineering, School of Engineering, Sun Yat-sen University, Guangzhou, 510275, China.

Australasian Physical & Engineering Sciences in Medicine
|August 24, 2017
PubMed
Summary

Late middle-aged adults exhibit reduced maximal grip force and longer force rising times compared to younger adults. They employ compensatory strategies to maintain grip control, mitigating age-related motor function decline.

Keywords:
AgingFuzzy entropy (FuzzyEn)Grip force controlMaximal grip force

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Area of Science:

  • Neuroscience
  • Human Motor Control
  • Gerontology

Background:

  • Grip force control is essential for daily activities and quality of life.
  • Aging is associated with changes in motor function, including grip strength.

Purpose of the Study:

  • To investigate the effects of age on grip force control.
  • To compare grip force control between young and late middle-aged adults.

Main Methods:

  • Visually guided tracking tasks were performed by young and late middle-aged adults.
  • Target force levels varied (25%, 50%, 75% of maximal grip force).
  • Performance measures included rise time, fuzzy entropy, mean force percentage, coefficient of variation, and target deviation ratio.

Main Results:

  • Maximal grip force was significantly lower in late middle-aged adults.
  • The force rising phase was systematically longer in older adults.
  • Fuzzy entropy effectively quantified grip force variability at higher force levels.

Conclusions:

  • Late middle-aged adults demonstrate reduced maximal grip force and slower force application.
  • Compensatory strategies are utilized by older adults to achieve target grip forces.
  • These findings highlight age-related adaptations in hand motor control.