Article

We determined the correlation between the Fitbit One and Actical
accelerometer for quantifying the 3-day step count and activity levels in
community-dwelling individuals with stroke. Method:
Twelve participants with a
mean age of 62.6 (SD 9.3) years wore both the Fitbit One and the Actical on the
non-paretic ankle for 3 days. Regression analyses were performed to examine
concurrent validity between the devices for step counts and sedentary, light,
moderate, and vigorous activity. The relative error of the Fitbit One compared
with the Actical in measuring step count was calculated. Results: Participants
spent about 80% of their days being sedentary. The associations between the
Fitbit One and the Actical were r>0.80 for step count and light-intensity
activity across the 3 days of free-living activity. The overall relative error in
measuring step count was 3.8%, with differences between those with walking speeds
of less than 0.58 metres per second and 0.58 metres per second or more (27.4% [SD
34.2] vs. -8.0% [SD 10.7], p<0.001). Conclusions: The Fitbit One was associated
with the Actical accelerometer in measuring step count and light-intensity
activity during free-living activity after stroke, but had lower error in
capturing step count for those with faster walking speeds. The Fitbit One may not
be valid for capturing higher intensity activity after stroke.

Langue : ANGLAIS