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Physical activity patterns assessed by accelerometry in older people.

Mark G Davis1, Kenneth R Fox

  • 1Exercise, Nutrition, and Health Sciences, School of Applied and Community Health, Centre for Sport, Exercise & Health, University of Bristol, Tyndall Avenue, Bristol, BS8 1TP, UK. mark.davis@bristol.ac.uk

European Journal of Applied Physiology
|October 26, 2006
PubMed
Summary

Objective accelerometry data reveals older adults aged 70+ exhibit significantly lower physical activity (PA) volume and intensity than younger adults. Nearly half of older adults failed to achieve sustained moderate-to-vigorous PA, indicating inadequate movement for optimal health.

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Area of Science:

  • Gerontology
  • Exercise Physiology
  • Biomedical Engineering

Background:

  • Previous research on older adult physical activity (PA) relied heavily on self-reporting.
  • Objective measurement of PA in adults aged 70 and over is scarce.
  • Understanding daily movement patterns is crucial for promoting healthy aging.

Purpose of the Study:

  • To objectively assess the volume and intensity of daily physical activity in older adults (>=70 years).
  • To compare the physical activity levels of older adults with those of younger adults.
  • To determine the extent to which older adults meet current health recommendations for physical activity.

Main Methods:

  • Utilized accelerometry (MTI actigraph model 7164) for objective, minute-by-minute movement assessment over 7 days.

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  • Included participants (N=161) with at least 5 days and 10 hours of valid actigraph data per day.
  • Analyzed data using Caloric.Bas software and a custom Microsoft Access macro.

    • Main Results:

    • Older adults demonstrated 37% lower overall activity counts per minute compared to young adults (p < 0.001).
    • Older adults performed significantly fewer minutes of moderate-to-vigorous physical activity (MVPA) daily (p < 0.001).
    • Nearly half of older adults did not achieve any sustained 10-minute MVPA bouts, and none met health guidelines.

    Conclusions:

    • Objective data indicates significantly lower physical activity volume and intensity in adults aged 70+ compared to younger individuals.
    • Current daily movement levels among older adults are likely insufficient for optimal health benefits.
    • Findings highlight a critical need for interventions to increase physical activity in the aging population.