This study builds upon our previous work investigating how light exposure influences mood. Our findings indicate that acute exposure to brighter melanopic equivalent daylight illuminance (EDI) can enhance happiness, motivation, and energetic mood. To expand on this, we will explore three key areas using data from the UK Biobank (UKB):
1. Additional Variables Influencing Light-Mood Relationships
While light exposure plays a significant role in mood regulation, other factors may contribute to these effects. We will examine:
o The relationship between physical activity levels (light, moderate, vigorous) and mood outcomes.
o The potential influence of heart rate variability and sedentary behavior on mood.
o How these variables interact with light exposure to explain individual differences in mood responses.
2. Seasonality and Longitudinal Mood Patterns
Seasonal variations in light exposure are known to impact mood. To assess these effects, we will:
o Use longitudinal follow-up data on sleep and mood to explore seasonal trends.
o Analyse timestamp variables from survey collections to track seasonal fluctuations in mood.
o Investigate whether variations in light exposure throughout the year mediate changes in mood and sleep patterns.
3. Genetic Risk and Mood Disorders
Individual genetic predisposition may modify the relationship between light exposure, activity, and mood outcomes. This study will:
o Assess how genetic risk factors for mood disorders influence responses to light exposure and physical activity.
o Investigate whether individuals with higher genetic risk for mood disorders exhibit different seasonal mood fluctuations.
o Explore interactions between genetic predisposition, light exposure, and activity patterns to identify potential risk or resilience factors.