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Sedentary Behavior and Phase Angle: An Objective Assessment in Physically Active and Inactive Older Adults
Liu-Yin Lin1,2,3, Jiaren Chen4, Ting-Fu Lai4,5
1Department of Health Promotion and Health Education, National Taiwan Normal University, Taipei 10610, Taiwan.
Nutrients
|January 11, 2024
Summary
Reducing sedentary behavior is crucial for physically inactive older adults, as high amounts are linked to lower phase angle (PhA). This finding highlights potential targets for health interventions in this demographic.
Area of Science:
- Gerontology
- Biomedical Engineering
- Public Health
Background:
- Sedentary behavior (SB) is prevalent in older adults and linked to adverse health outcomes.
- Phase angle (PhA), a marker of cell membrane integrity and nutritional status, is important for assessing health in aging populations.
- Understanding the relationship between SB and PhA is essential for developing targeted health interventions.
Purpose of the Study:
- To investigate the associations between objectively measured sedentary behavior (SB) amount and patterns with phase angle (PhA) in older adults.
- To compare these associations between physically active and inactive older adults.
- To provide evidence for future interventions aimed at improving SB and PhA in this population.
Main Methods:
- A cross-sectional study involving 166 older adults (≥ 65 years) in Taiwan.
- Objective assessment of total SB amount, SB patterns (bouts, breaks), and physical activity using a triaxial accelerometer.
- Measurement of PhA using a multifrequency bioelectrical impedance analyzer (BIA).
- Multiple linear regression analysis was used to examine associations, with stratification by physical activity levels.
Main Results:
- In the total sample and among physically active individuals, no significant associations were found between SB amount/patterns and PhA.
- Among physically inactive older adults, a higher total SB amount was significantly associated with a lower PhA (B: -0.059).
- These findings suggest that SB significantly impacts PhA primarily in the inactive older adult subgroup.
Conclusions:
- Minimizing total sedentary behavior is important for physically inactive older adults to potentially improve their phase angle.
- The study highlights the differential impact of SB on PhA based on physical activity levels in older populations.
- Evidence supports the development of interventions targeting SB reduction in inactive older adults to enhance cellular health markers like PhA.
