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J Diabetes Sci Technol. 2017 Sep;11(5):899-903. doi: 10.1177/1932296816651631. Epub 2016 May 30.

Monitoring Location-Specific Physical Activity via Integration of Accelerometry and Geotechnology Within Patients With or At Risk of Diabetic Foot Ulcers: A Technological Report.

Author information

1
1 Center for Lower Extremity Ambulatory Research (CLEAR) at the Dr. William M. Scholl College of Podiatric Medicine, Rosalind Franklin University, North Chicago, IL, USA.
2
2 Department of Geography at DePaul University, Chicago, IL, USA.

Abstract

OBJECTIVE:

Physical activity variability is a risk factor for diabetic foot ulcers (DFU). Geographic context may influence variability. This study developed initial methods for monitoring location-specific physical activity in this population. Secondarily, preliminary comparisons in location-specific physical activity were made between patients at risk versus patients with active DFU.

METHODS:

Five at-risk and 5 actively ulcerated patients were monitored continuously for 72 hours with physical activity and GPS monitors. A custom algorithm time synchronized the 2 devices' data.

RESULTS:

On average for all 10 subjects, 1.5 ± 2.1% of activity lacked a corresponding GPS location. 80 ± 11% of self-reported activity events per subject had a GPS identified location. The GPS identified locations were in agreement with the self-reported locations 98 ± 6% of the time. DFU participants' weight-bearing activity was 188% higher at home than away from home. At-risk participants showed similar weight-bearing activity at home as active DFU participants, however, at-risk participants had 132% more weight-bearing activity away-from-home.

CONCLUSIONS:

Objectively monitoring location-specific physical activity proved feasible. Future studies using such methodology may enhance understanding of pathomechanics and treatment of DFU.

KEYWORDS:

GPS; diabetic foot ulcer; monitor; physical activity

PMID:
27246669
PMCID:
PMC5950978
DOI:
10.1177/1932296816651631
[Indexed for MEDLINE]
Free PMC Article

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