Related Experiment Video
Updated: Nov 3, 2025

Dynamic Digital Biomarkers of Motor and Cognitive Function in Parkinson's Disease
Published on: July 24, 2019
Are Mobile Persons With Parkinson Disease Necessarily More Active?
Jenna A Zajac1, James T Cavanaugh, Teresa Baker
1Departments of Physical Therapy and Athletic Training (J.A.Z., T.B., T.R.D., T.N., T.D.E) and Occupational Therapy (D.F.), Sargent College of Health and Rehabilitation Sciences, Boston University, Boston, Massachusetts; Department of Physical Therapy (J.T.C.), University of New England, Portland, Maine; Department of Kinesiology (C.C.-S.), College of Agriculture, Health, and Natural Resources, University of Connecticut, Storrs, Connecticut; Program in Physical Therapy (R.P.D., K.S.R., G.M.E), Department of Neuroscience (G.M.E), and Department of Neurology (R.P.D., G.M.E), Washington University in St Louis School of Medicine, St Louis, Missouri; School of Public Health (M.L.), Boston University, Boston, Massachusetts; and Department of Neurology (M.S.-H., C.A.T.), Parkinson's Disease and Movement Disorders Center, Boston University, Boston, Massachusetts.
Walking activity in Parkinson disease (PD) significantly impacts home and neighborhood mobility. Daily steps are more strongly linked to local movement than to broader community engagement.
Area of Science:
- Neurology
- Movement Science
- Rehabilitation
Background:
- Maintaining walking activity is crucial for individuals with Parkinson disease (PD) to mitigate functional decline.
- The precise role of walking activity in enabling home and community mobility for PD patients remains unclear.
Purpose of the Study:
- To investigate the relationship between objectively measured walking activity and different domains of home and community mobility in persons with PD.
- To determine if walking activity influences mobility within the neighborhood versus beyond.
Main Methods:
- Analysis of baseline data from 69 participants in a randomized controlled PD trial.
- Utilized the Life-Space Assessment (LSA) to measure mobility extent, frequency, and independence across five levels.
- Employed accelerometers to quantify daily walking steps over seven days.
Main Results:
- Walking activity significantly correlated with mobility within the neighborhood (Levels 1-3) but not beyond (Levels 4-5) or overall.
- Higher daily step counts were associated with greater mobility in Levels 1, 2, and 3 of the LSA.
- Active participants showed significantly greater Level 1-3 mobility scores compared to sedentary individuals.
Conclusions:
- Walking activity is a key determinant of localized mobility (home and neighborhood) in Parkinson disease.
- The summed score for mobility within the neighborhood (Levels 1-3) may serve as a more sensitive indicator of walking activity's impact than the total LSA score.
Related Concept Videos
Parkinson's Disease: Overview
Parkinson's Disease: Treatment
Parkinson's Disease is primarily a result of the loss of dopaminergic neurons in the substantia nigra pars compacta. The cornerstone of...

