| Title |
Detection of walk tests in free-living activities using a wrist-worn device / |
| Authors |
Sokas, Daivaras ; Paliakaitė, Birutė ; Rapalis, Andrius ; Marozas, Vaidotas ; Bailón, Raquel ; Petrėnas, Andrius |
| DOI |
10.3389/fphys.2021.706545 |
| Full Text |
|
| Is Part of |
Frontiers in physiology.. Lausanne : Frontiers Media S.A.. 2021, vol. 12, art. no. 706545, p. 1-13.. ISSN 1664-042X |
| Keywords [eng] |
6-min walk test ; functional capacity ; functional performance ; functional status ; physical activity ; fitness tracker ; wearable device ; fitbit |
| Abstract [eng] |
Exercise testing to assess the response to physical rehabilitation or lifestyle interventions is administered in clinics thus at best can be repeated only few times a year. This study explores a novel approach to collecting information on functional performance through walk tests, e.g., a 6-min walk test (6MWT), unintentionally performed in free-living activities. Walk tests are detected in step data provided by a wrist-worn device. Only those events of minute-to-minute variation in walking cadence, which is equal or lower than the empirically determined maximal SD (e.g., 5-steps), are considered as walk test candidates. Out of detected walk tests within the non-overlapping sliding time interval (e.g., 1-week), the one with the largest number of steps is chosen as the most representative. This approach is studied on a cohort of 99 subjects, assigned to the groups of patients with cardiovascular disease (CVD) and healthy subjects below and over 40-years-old, who were asked to wear the device while maintaining their usual physical activity regimen. The total wear time was 8,864 subject-days after excluding the intervals of occasionally discontinued monitoring. About 82% (23/28) of patients with CVD and 88% (21/24) of healthy subjects over 40-years-old had at least a single 6MWT over the 1st month of monitoring. About 52% of patients with CVD (12/23) and 91% (19/21) of healthy subjects over 40-years-old exceeded 500 m. Patients with CVD, on average, walked 46 m shorter 6MWT distance (p = 0.04) compared to healthy subjects. Unintentional walk testing is feasible and could be valuable for repeated assessment of functional performance outside the clinical setting. |
| Published |
Lausanne : Frontiers Media S.A |
| Type |
Journal article |
| Language |
English |
| Publication date |
2021 |
| CC license |
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