Tracking of Pedometer-Determined Physical Activity in Healthy Elderly Japanese People

Naofumi Yamamoto, Mieko Shimada, Naoki Nakagawa, Susumu S. Sawada, Mamoru Nishimuta, Yasuo Kimura, Masaharu Ohashi, Hidenori Asai, Hideo Miyazaki, I. Min Lee, Steven N. Blair, Yutaka Yoshitake

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Background: Tracking refers to the tendency for an individual to maintain their rank within a group over time. This study longitudinally investigated the 8-year tracking of pedometer-determined physical activity among physically independent elderly Japanese people aged 72 to 80 years. Methods: Steps/day were measured when participants were aged 72 and assessed again after 2, 5, and 8 years. The number of participants with a 2-year follow-up (72 to 74 years) was 177 (101 males, 76 females), with a 5-year follow-up (72 to 77 years) was 183 people (110 males, 73 females), and with an 8-year follow-up (72 to 80 years) was 145 people (91 males, 54 females). Step counts were continuously measured for 1 week in January, April, July, and October during each year of assessment. Results: A high rank correlation coefficient for steps/day exceeding 0.60 was obtained at the 2-, 5- and 8-year follow-up examinations for both males and females. Conclusion: This study suggests that the rank within a group of pedometer-determined steps/day remains stable over up to 8 years in healthy Japanese people aged between 72 to 80 years old.

Original languageEnglish
Pages (from-to)1421-1429
Number of pages9
JournalJournal of Physical Activity and Health
Issue number10
Publication statusPublished - 2015 Oct
Externally publishedYes


  • Aging
  • Follow-up study
  • Inactivity
  • Low-intensity physical activity
  • Stability
  • Walking

ASJC Scopus subject areas

  • Medicine(all)


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