Assessing daily physical activity in junior high school students using pedometer with accelerometer

Minoru Adachi, Kensaku Sasayama, Kyota Okishima, Yoshiyuki Sunami, Masako Shiomi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The purpose of present study was to examine validity of pedometer with accelerometer (Lifecorder-EX ; LC) and to assess the daily physical activity (PA) of Japanese junior high school students by LC method. Firstly, to examine validity of LC, ten students (13.6±0.5 years old) wearing LC on their waists performed the walking and running tests. Energy expenditure was measured by the expired gas analysis method during the tests. The results showed that the activity level of LC had a high correlation with the exercise intensity (VO2 : r = 0.948, METs :r = 0.931), and it was from 7 to 9 (LC7 -9) in the more intense activity than running. Secondly, PA of 206 boys and 220 girls aged 12 -15 years were measured using LC. Step counts and activity time of LC7 -9 each were 9500 -15000 counts and 10-19 minutes on weekdays, and 6500 -10000 counts and 5 -12 minutes on weekends. PA analyzed by MANOVA were lower on weekends than on weekdays, and decreased in proportion as grade, and that of boys were significantly higher than that of girls. Present study suggests that LC method is a good way of measuring PA for junior high school students in free-living condition.

Original languageEnglish
Pages (from-to)275-284
Number of pages10
JournalJapanese Journal of Physical Fitness and Sports Medicine
Issue number2
Publication statusPublished - Apr 2009
Externally publishedYes


  • Junior high school students
  • Pedometer with accelerometer
  • Physical activity

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation


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