RT Journal Article SR Electronic T1 Comparison of interdevice measurement difference of pedometers in younger and older adults JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP 95 OP 99 DO 10.1136/bjsm.2007.045179 VO 44 IS 2 A1 M Ayabe A1 K Ishii A1 K Takayama A1 J Aoki A1 H Tanaka YR 2010 UL http://bjsm.bmj.com/content/44/2/95.abstract AB Objectives In this study, 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 was examined. Methods 17 younger individuals and 28 older individuals wore two pedometers (Lifecorder (LC) and EC-200 (YM)) simultaneously for 7 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 metabolic equivalent (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 interdevice difference with the number of steps significantly decreased in inactive older individuals compared with the active older and younger individuals, and it was also significantly negatively correlated with the time spent in light-intensity physical activity (LPA) (r = 0.523, p<0.01). Conclusion This study showed that the interdevice difference with the number of steps significantly increased in older participants due to the greater length of time spent in LPAs.