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Updated: Sep 5, 2025
05:59
Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
Published on: March 7, 2019
6.8K
Continuous-Time Modeling of the Bidirectional Relationship Between Incidental Affect and Physical Activity
Geralyn R Ruissen1, Mark R Beauchamp1, Eli Puterman1
1School of Kinesiology, University of British Columbia, Vancouver, BC, Canada.
Summary
Positive and negative feelings predict physical activity, and physical activity influences feelings. These effects are strongest when measured across 7-9 hour intervals, suggesting medium-term dynamics are key.
Area of Science:
- Psychology
- Behavioral Science
- Health Science
Background:
- Bidirectional link between daily feelings (incidental affect) and physical activity is suggested.
- Inconsistencies in prior research stem from varied time lags between affect and activity measurements.
Purpose of the Study:
- Examine temporal specificity in the relationship between affect and physical activity.
- Investigate the dynamic interplay between positive/negative affect and moderate-to-vigorous physical activity (MVPA) using a novel continuous-time analysis.
Main Methods:
- 126 adults participated in a 14-day ambulatory assessment.
- Momentary affect and physical activity (Fitbit) were measured six times daily.
- Hierarchical Bayesian continuous-time structural equation modeling analyzed affect-MVPA dynamics.
Main Results:
- Positive and negative affect predicted subsequent MVPA.
- MVPA engagement predicted subsequent positive and negative affect.
- Affect had a stronger influence on predicting MVPA than vice versa, especially at 7-9 hour intervals.
Conclusions:
- A recursive relationship exists between incidental affect and MVPA.
- This relationship is most pronounced at medium-term intervals (7-9 hours).
- Future research and interventions should consider these medium-term dynamics.
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