%0 Journal Article %T Can We Use Consumer-Wearable Activity Tracker Fitbit in Parkinson Disease? %A Kazuo Abe %J Advances in Parkinson's Disease %P 15-23 %@ 2169-9720 %D 2021 %I Scientific Research Publishing %R 10.4236/apd.2021.102002 %X Consumer-wearable activity trackers have been used for monitoring health-related metrics to estimate steps, distance, physical activity, energy expenditure, and sleep. The purpose of this mini review was to summarize the evidence for validity of the most popular wrist-worn activity tracker (Fitbit) to estimate those health-related metrics in Parkinson disease. We researched full-length English studies in PubMed, Science Direct, Google Scholar, and Scopus, through September, 2021. In total, 27 studies and a textbook description were included in the review. To adapt consumer-wearable activity trackers for evaluating health-related metrics in Parkinson¡¯s disease (PD) patients, there may be some points to be elucidated and conquered. First, measurement accuracy and precision are required. Second, inter-device reliability for measuring steps, distance, and energy expenditure must be considered. Third, wearability: there are some types of device such as wrist-worn, ankle-worn, belt-fixed, and so on. Overall, Fitbit has advantage for these points. This mini review indicates that Fitbit has enough measurement accuracy and precision to estimate health-related metrics of PD patients including amount of step, physical activity energy expenditure, and quality of sleep. %K Parkinson Disease %K Consumer-Wearable Activity Trackers %K Fitbit %K Physical Activity %K Sleep %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=114042