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Assessment of Physical Activity Intensity with Accelerometers and Oxygen Consumption
Published on: June 20, 2025
Exploring Differences in Older Adult Accelerometer-Measured Sedentary Behavior and Resting Blood Pressure Before and
Mikael Anne Greenwood-Hickman1, Jing Zhou1, Andrea Cook1
1Kaiser Permanente Washington Health Research Institute, Seattle, WA, USA.
The COVID-19 pandemic was associated with higher blood pressure in older adults. Sedentary behavior increased, while physical activity decreased, highlighting potential long-term health risks for this population.
Area of Science:
- Gerontology
- Public Health
- Epidemiology
Background:
- Older adults exhibit higher sedentary behavior (SB) and lower physical activity.
- The COVID-19 pandemic and restrictions exacerbated these trends, with significant health implications.
- Objective data on pandemic-related changes in SB and health among older adults are limited.
Purpose of the Study:
- To compare SB, physical activity, and blood pressure (BP) in older adults before and during the COVID-19 pandemic.
- To assess the impact of pandemic-related lifestyle changes on health outcomes in this demographic.
Main Methods:
- Utilized thigh-worn activPAL accelerometers and BP measurements from pre-pandemic and post-pandemic cohorts.
- Compared data from 95 pre-pandemic participants with 60 post-pandemic participants.
- Employed linear regression models adjusted for demographic and health factors.
Main Results:
- The post-pandemic group was older, more female, and included a higher proportion of individuals of color.
- Systolic blood pressure was significantly higher in the post-pandemic group (6.8 mmHg increase).
- Trends indicated increased sitting time, fewer daily steps, and more self-reported TV time post-pandemic, though not statistically significant.
Conclusions:
- The COVID-19 pandemic was linked to elevated systolic blood pressure in older adults.
- Observed trends suggest a worsening of sedentary behavior and a decrease in physical activity post-pandemic.
- Further research is needed to fully understand these impacts and inform interventions for older adults.
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Preparation:
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