Fractal Analysis Linking Physical Activity Patterns, Health, and Mortality

Technology #ua18-003

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Yann Klimentidis
Assistant Professor, Epidemiology & Biostatistics
Gene Alexander
Professor, Psychology
David Raichlen
Associate Professor, Anthropology
Managed By
Lewis Humphreys
Licensing Manager (520) 626-2574

Title: Fractal Analysis Linking Physical Activity Patterns, Health and Mortality


Invention: This invention is a novel method for linking patterns from accelerometers to health and mortality problems by measuring fractal complexity.


Background: Accelerometers are devices that measure proper acceleration and have multiple applications in different industries. Typically, accelerometers are found in devices that monitor and track physical activity for health-related purposes. The clinical utility of the information tracked by these devices is highly under-utilized. This invention uses de-trended fluctuation analysis (DFA) on raw data taken from wearable accelerometers to allow professionals and the public to monitor physiological health and mortality risk.



  • Accelerometer industry
  • Health monitoring/tracking
  • Behavioral health
  • Exercise



  • Measures fractal complexity
  • Predicts health outcomes
  • Non-invasive biomarker
  • Tracks aging and mortality risk

Licensing Manager:

Lewis Humphreys

(520) 626-1213