Associations between Changes in Activity and Sleep Quality and Duration over Two Years

Area of Science:

• Behavioral science
• Public health
• Epidemiology

Background:

• Insufficient physical activity (PA) and inadequate sleep quality (SQ) and sleep duration (SD) are prevalent behaviors linked to chronic health conditions.
• The evidence on bidirectional relationships between PA, SQ, and SD is inconsistent.
• Understanding the interplay between PA and sleep is crucial as changes in one behavior can impact the other.

Purpose of the Study:

• To examine the relationship between changes in PA, SQ, and SD over a 2-year period in middle-aged adults.
• Investigate the bidirectional nature of the association between physical activity and sleep parameters.

Main Methods:

• A 2-year longitudinal study involving 3649 middle-aged adults (42-72 years) from Brisbane, Australia.
• Mail surveys administered in 2011 and 2013 assessed PA, SQ, SD, and sociodemographic/health characteristics.
• Multinomial logistic regression analyses were used to explore patterns of change.

Main Results:

• A bidirectional relationship was found between physical activity (PA) and sleep quality (SQ).
• Maintaining or improving SQ was associated with increasing or maintaining PA, and vice versa.
• No significant association was observed between changes in PA and changes in SD.

Conclusions:

• A bidirectional relationship exists between physical activity and sleep quality, but not sleep duration.
• Interventions targeting both PA and SQ concurrently are recommended for middle-aged adults.
• Middle-aged adults with poor SQ could benefit from increased PA, and improved SQ may foster higher activity levels.