Dori Rosenberg, PhD, MPH, has conducted extensive research into physical activity and sedentary time, with a central focus on older adults and people with chronic conditions, who often face substantial barriers to engaging in physical activity. Dr. Rosenberg has a particular interest in helping to build an evidence base for the health effects of sedentary time, given that the vast majority of people’s waking hours are spent sitting, yet we are only starting to understand how this impacts health.
Dr. Rosenberg currently leads the Healthy Aging Resources to Thrive (HART) Trial. HART is testing the effects of sitting reduction on cardiovascular and metabolic health outcomes through a large randomized controlled trial. Dr. Rosenberg also leads the accelerometer sub-study of the Adult Changes in Thought (ACT) cohort study where she is examining how 24-hour activity cycle behaviors (sedentary time, physical activity, sleep) are associated with cognition and physical function in older adults.
A key step in better understanding sedentary behaviors is having validated measures. Dr. Rosenberg validated the widely used Sedentary Behavior Questionnaire, which is a self-reported measure of sedentary time (see below to learn more). She has also contributed to studies on sedentary behavior measurement with accelerometers, including machine learning approaches.
As part of her epidemiologic research, Dr. Rosenberg investigates how aspects of the built environment — such as parks, open space, and sidewalks — encourage better health, particularly as we age. Further, she is interested in the ways social determinants of health in early life, including the neighborhood environment, impact cognitive and physical aging and is exploring this in the ACT cohort.
In her intervention research, Dr. Rosenberg employs mobile health approaches to promoting physical activity and reducing sedentary time, including in a recent micro-randomized trial for physical activity after bariatric surgery. She is currently working with colleagues on piloting a mobile health application for mindfulness and acceptance to support healthy eating and physical activity.
Dr. Rosenberg serves on a subcommittee of the President's Council on Sports, Fitness, & Nutrition to inform the development of the Physical Activity Guidelines Midcourse Report on older adults. She is also past co-chair of the Physical Activity Special Interest Group at the Society of Behavioral Medicine. Additionally, she is an associate professor in the Health Systems Science Department of the Kaiser Permanente Bernard J. Tyson School of Medicine, affiliate associate professor in the Department of Health Services at the University of Washington School of Public Health, and a fellow of the Society of Behavioral Medicine.
The following tools are available for free download and use.
Sedentary Behavior Questionnaire: This is a self-reported measure of sedentary time, taking into account sedentary behaviors on weekdays and weekends. It has been used widely in research studies across the globe to describe sedentary behavior and track changes in sedentary time.
Walking Route Audit Tool for Seniors (WRATS): WRATS is an audit tool for identifying the best walking routes for older adults. The tool includes 59 items relating to functionality, safety, aesthetics, and destinations, among other domains. Most domains are measured using a 3-point scale. The tool can be used by the general public as well as by researchers.
Physical activity, sedentary behavior, nutrition, lifestyle interventions, technology applications, built environment
Changes to health behaviors, including sedentary behavior, physical activity, and nutrition; role of built environment; promotion of physical function and mobility; fall prevention; cognitive function; Alzheimer's disease prevention
Obesity prevention and control; physical activity and nutrition promotion; role of sedentary behaviors; role of built environment; acceptance and mindfulness interventions for weight management; mobile health interventions
Prevention of further disease, declines in function, and disability; self-management; fall prevention
Health behavior change, fall prevention, Alzheimer’s disease prevention
Mobile health interventions for weight, physical activity, diet, and sedentary time; accelerometers (e.g., Fitbit, ActiGraph, activPAL) for measurement and intervention
Bellettiere J, Nakandala S, Tuz-Zahra F, Winkler E, Hibbing PR, Healy GN, Dunstan D, Owen N, Greenwood-Hickman MA, Rosenberg DE, Zou J, Carlson JA, Di C, Dillon L, Jankowska MM, LaCroix AZ, Ridgers ND, Kumar A, Natarajan L. CHAP-Adult: a reliable and valid algorithm to classify sitting and measure sitting patterns using data from hip-worn accelerometers in adults aged 35+. J Meas Phys Behav. 2022 Sept 21:1-9. doi: 10.1123/jmpb.2021-0062.
Cruz M, Drewnowski A, Bobb JF, Hurvitz PM, Moudon AV, Cook A, Mooney SJ, Buszkiewicz JH, Lozano P, Rosenberg DE, Kapos F, Theis MK, Anau J, Arterburn D. Differences in weight gain following residential relocation in the Moving to Health (M2H) study. Epidemiology. 2022 Sep 1;33(5):747-755. doi: 10.1097/EDE.0000000000001505. Epub 2022 May 20. PubMed
Carlson JA, Ridgers ND, Nakandala S, Zablocki R, Tuz-Zahra F, Bellettiere J, Hibbing PR, Steel C, Jankowska MM, Rosenberg DE, Greenwood-Hickman MA, Zou J, LaCroix AZ, Kumar A, Natarajan L. CHAP-Child: An open source method for estimating sit-to-stand transitions and sedentary bout patterns from hip accelerometers among children. Int J Behav Nutr Phys Act. 022 Aug 26;19(1):109. doi: 10.1186/s12966-022-01349-2. PubMed
Crist K, Full KM, Linke S, Tuz-Zahra F, Bolling K, Lewars B, Liu C, Shi Y, Rosenberg D, Jankowska M, Benmarhnia T, Natarajan L. Health effects and cost-effectiveness of a multilevel physical activity intervention in low-income older adults; results from the PEP4PA cluster randomized controlled trial. Int J Behav Nutr Phys Act. 2022 Jun 27;19(1):75. doi: 10.1186/s12966-022-01309-w. PubMed
Trinh L, Alibhai SMH, Culos-Reed N, Sabiston CM, Jones JM, Rosenberg DE, Whitehorn A, Bastas D, Faulkner GE. Associations of light physical activity, moderate-to-vigorous physical activity and sedentary behavior with quality of life in men on androgen deprivation therapy for prostate cancer: a quantile regression analysis. J Behav Med. 2022 Aug;45(4):533-543. doi: 10.1007/s10865-022-00285-7. Epub 2022 Jan 21. PubMed
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