Dean Tudor-Locke is a walking behavior researcher and a recognized world leader in objective physical activity assessment and promotion, specifically focused on pedometer or accelerometer-determined ambulatory activity captured as steps/day across the lifespan. She is a trained program evaluator and adult educator focused on practical applications in objective monitoring measurement and intervention. She has also published on clinical vs. free-living gait analysis, including interpretation of cadence as a simple indicator of ambulatory patterns. She has also published work documenting the relationship between time spent in sedentary behavior and relatively low ambulatory activity, measured as steps/day.