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Variability in activity may precede diabetic foot ulceration
David G Armstrong1, Lawrence A Lavery, Katherine Holtz-Neiderer
1Dr. William M. Scholl College of Podiatric Medicine at Rosalind Franklin University of Medicine and Science, Chicago, Illinois 60064, USA. armstrong@usa.net
Diabetes Care
|July 28, 2004
Summary
Lower daily activity and increased variability in physical activity may increase the risk of diabetic foot ulcers. Modulating activity patterns could potentially reduce ulceration risk in high-risk individuals.
Area of Science:
- Diabetology
- Podiatry
- Physical Activity Research
Background:
- Diabetic foot ulcers are a significant complication of diabetes, often linked to neuropathy and previous ulceration.
- Understanding the role of physical activity in ulcer development is crucial for prevention strategies.
Purpose of the Study:
- To investigate the association between physical activity patterns and the incidence of neuropathic foot ulceration in individuals with diabetes.
- To identify specific activity metrics that may predict ulcer development.
Main Methods:
- Prospective longitudinal study involving 100 individuals with diabetes at high risk for ulceration.
- Continuous monitoring of daily physical activity using computerized activity monitors over a minimum of 25 weeks.
- Analysis of average daily activity and activity variability (coefficient of variation).
Main Results:
- Individuals who developed foot ulcers had significantly lower average daily activity compared to those who did not (809.0 vs. 1,394.5 units, P=0.03).
- Activity variability, measured by the coefficient of variation, was significantly higher in the ulceration group (96.4% vs. 44.7%, P=0.0001).
- Increased activity variability was also observed in the two weeks preceding ulceration (P=0.02).
Conclusions:
- Lower overall physical activity and greater variability in daily activity are associated with an increased risk of foot ulceration in individuals with diabetes.
- Interventions aimed at stabilizing or modulating activity patterns may help reduce ulceration risk in this high-risk population.