Using step activity monitoring to characterize ambulatory activity in community-dwelling older adults.

Journal Article (Journal Article)

OBJECTIVES: To explore the potential of using step activity monitoring to detect differences in ambulatory activity associated with advancing age and declining function in community-dwelling seniors. DESIGN: Cross-sectional pilot study. SETTING: General communities of Seattle, Washington; Catonsville, Maryland; and Durham, North Carolina. PARTICIPANTS: Thirty healthy younger adults, 28 healthy older adults, and 12 older adults reporting functional limitations. MEASUREMENTS: Ambulatory activity data were collected over 6 days with the StepWatch 3. Average daily values were calculated for number of steps, number of minutes of activity, number of activity bouts, variability of minute-to-minute activity, and randomness of minute-to-minute activity fluctuations. RESULTS: Healthy older adults engaged in fewer bouts of activity (P=.03) and displayed less-variable activity (P=.02) than younger adults. Older adults reporting functional limitations not only engaged in fewer bouts of activity (P=.009) and less variable activity (P<.001) than younger adults, but also accumulated fewer total steps (P=.003) and minutes of activity (P=.008) and had less-random minute-to-minute activity fluctuations (P=.02). CONCLUSION: Step activity monitoring data were useful for detecting differences in ambulatory activity according to age and functional limitation. Monitor-based measures reflecting patterns of ambulatory activity show promise for use in studies of physical functioning.

Full Text

Duke Authors

Cited Authors

  • Cavanaugh, JT; Coleman, KL; Gaines, JM; Laing, L; Morey, MC

Published Date

  • January 1, 2007

Published In

Volume / Issue

  • 55 / 1

Start / End Page

  • 120 - 124

PubMed ID

  • 17233695

International Standard Serial Number (ISSN)

  • 0002-8614

Digital Object Identifier (DOI)

  • 10.1111/j.1532-5415.2006.00997.x


  • eng

Conference Location

  • United States