Article

OBJECTIVE: To assess in a feasibility study the mobility of persons with
transfemoral amputations using data collected from a popular, consumer-oriented
activity monitor (Fitbit). DESIGN: Observational cohort study. SETTING: Research
hospital outpatient evaluation. PARTICIPANTS: Nine subjects with transfemoral
amputations (4 women and 5 men, ages 21-64 years) and Medicare functional
assessments (K level) of K3 (n = 7), K2 (n = 1), and K4 (n = 1). METHODS:
One-week monitoring of physical activity using the Fitbit One activity monitor.
MAIN OUTCOME MEASURES: Daily estimates of step counts, distance walked,
floors/stairs climbed, calories burned, and proprietary Fitbit activity scores.
For each day, the amount of time in each of the following levels of activity was
also reported: sedentary, lightly active, fairly active, and highly active.
RESULTS: The percentage of movement time above the fairly active level had a
predictable relationship to the designated K level. The average activity measures
show decreased levels of activity for obese subjects (body mass index >30).
Estimated step counts were highly predictive/redundant with estimated miles
walked without setting individual stride lengths. Using linear regression
prediction models, calorie estimates were found to be highly dependent on subject
age, height, and weight, whereas the proprietary activity score was independent
of all 3 demographic factors. CONCLUSIONS: This feasibility study demonstrates
that the Fitbit activity monitor estimates the activity of subjects with
transfemoral amputations, producing results that correlate with their K-level
functional activity classifications. The Fitbit activity score is independent of
individual variations in age, weight, and height compared with estimated calories
for this small sample size. These tools may provide useful insights into
prosthetic use in an at-home environment.
CI - Copyright (c) 2014 American Academy of Physical Medicine and Rehabilitation.
Published by Elsevier Inc. All rights reserved.

Langue : ANGLAIS