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Comparison of inter-device measurement difference of pedometers in younger and older adults
  1. Makoto Ayabe (ayabemakoto{at}mac.com)
  1. Juntendo University, Japan
    1. Kojiro Ishii (ayabemakoto{at}mac.com)
    1. Hokkaido University, Japan
      1. Kohsaku Takayama (ayabemakoto{at}mac.com)
      1. Hokkaido University, Japan
        1. Junichiro Aoki (ayabemakoto{at}mac.com)
        1. Juntendo University, Japan
          1. Munehiro Shindo (ayabemakoto{at}mac.com)
          1. Fukuoka University, Japan
            1. Hiroaki Tanaka (ayabemakoto{at}mac.com)
            1. Fukuoka University, Japan

              Abstract

              Objectives. The purpose of the present investigation was to examine the relationship between inter-instrument differences in regard to the daily number of steps with the intensity distribution of daily physical activity in younger and older adults.

              Methods. Seventeen younger individuals and 28 elderly individuals wore two pedometers (Lifecorder, (LC) and EC-200, (YM)) simultaneously for seven days, in order to determine the number of steps each took. Furthermore, LC determined the time spent in light, moderate and vigorous physical activity, corresponding to <3 METs, 3 to 6 METs and >6 METs, respectively.

              Results. The LC detected a significantly larger number of steps than YM (p< 0.001), yet there was a strong relationship between the two measurements (r= 0.962, p<0.001). The inter-device difference with the number of steps significantly decreased in inactive elderly individuals in comparison to the active elderly and younger individuals, and it was also significantly negatively correlated with the time spent in light intensity physical activity (r=0.523, p<0.01).

              Conclusion. These results suggested that the inter-device difference with the number of step significantly decreased in the elderly due to the greater length of the time spent in light intensity physical activity.

              https://doi.org/10.1136/bjsm.2007.045179

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