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Related Experiment Videos

Lower-limb extensor power and lifting characteristics in disabled elders.

Teresa M Dancewicz1, David E Krebs, Chris A McGibbon

  • 1Massachusetts General Hospital Biomotion Laboratory and Massachusetts General Hospital Institute of Health Professions, Boston, MA 02129-4557, USA.

Journal of Rehabilitation Research and Development
|April 13, 2004
PubMed
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Resistance exercise improved strength and lifting efficiency in functionally limited elders. This program demonstrated benefits for disabled seniors, enhancing leg strength and coordination for daily tasks.

Area of Science:

  • Gerontology
  • Rehabilitation Science
  • Biomechanics

Background:

  • Limited research exists on resistance training interventions for disabled elders.
  • Functional limitations in elders often impact daily activities like lifting.
  • Resistance exercise may improve muscular recruitment and coordination for lifting tasks.

Purpose of the Study:

  • To investigate the effects of a 6-month in-home resistance exercise program on lifting function in functionally limited elders.
  • To analyze biomechanical and temporal outcomes of resistance training in this population.
  • To identify correlations between leg muscle power, strength, and lifting performance.

Main Methods:

  • Eighty-nine functionally limited elders (aged 60.3–89.8 years) participated in a 6-month video-facilitated, in-home resistance exercise program using elastic bands.

Related Experiment Videos

  • Biomechanical variables (leg extensor power, work, squared jerk), temporal outcomes (lift time), and leg extensor strength were assessed.
  • Analysis of variance (ANOVA) compared the experimental group to a control group and analyzed subgroups based on pretest strength.

    • Main Results:

    • The experimental group showed significant improvements in knee extension (16.7%) and hip extension (20.5%) strength.
    • Weakest subjects in the resistance-trained group significantly increased hip extension strength compared to controls.
    • A trend towards decreased total lift time was observed in resistance-trained subjects, indicating improved lifting efficiency.
    • Significant correlations were found between leg extension power, strength, work, and reduced lift time.

    Conclusions:

    • Resistance-trained disabled elders experienced notable strength gains.
    • The study indicated trends toward improved coordination and more efficient lifting in the resistance-trained group.
    • Leg muscle power was identified as a key factor related to better functional lifting performance in elders.