(Human Kinetics, Inc., 2009-10) Webber, Sandra C.; Porter, Michelle M.
This exploratory study examined the feasibility of using Garmin global positioning
system (GPS) watches and ActiGraph accelerometers to monitor walking and other
aspects of community mobility in older adults. After accuracy at slow walking speeds
was initially determined, 20 older adults (74.4 ± 4.2 yr) wore the devices for 1 day.
Steps, distances, and speeds (on foot and in vehicle) were determined. GPS data
acquisition varied from 43 min to over 12 hr, with 55% of participants having more
than 8 hr between initial and final data-collection points. When GPS data were
acquired without interruptions, detailed mobility information was obtained regarding
the timing, distances covered, and speeds reached during trips away from home.
Although GPS and accelerometry technology offer promise for monitoring community
mobility patterns, new GPS solutions are required that allow for data collection
over an extended period of time between indoor and outdoor environments.