more greenery linked to earlier free-day bedtimes in children
Exact: β = -0.056
Higher neighbourhood vegetation (NDVI) is associated with earlier free-day bedtimes in children
The association between neighbourhood greenness (NDVI) and earlier bedtime was observed not just on weekdays but also on free-days among 16,814 children in Shanghai. This consistency across both day types strengthens the case that green urban environments support circadian alignment in children, potentially through reduced light pollution, more daytime outdoor activity, and other nature-related pathways.
It was observed that higher NDVI was associated with earlier bedtimes (β = -0.080 on weekday and -0.056 for free-day; both p < 0.001)
Related findings
physiological and psychological responses measured during urban walks
Psychophysiological responses of 29 subjects were analyzed in relation to urban street scene configuration and color
Chiara Maninetti et al., 2026, Frontiers in Psychology
+12%
higher prevalence of poor (vs. favorable) sleep health with less greenspace
Low/moderate greenspace was associated with a 12% higher prevalence of poor sleep health compared to favorable sleep health
Symielle A. Gaston et al., 2025, Environmental Research
+32%
higher prevalence of moderate (vs. favorable) sleep health with less greenspace
Low/moderate greenspace was associated with a 32% higher prevalence of moderate sleep health compared to favorable sleep health
Symielle A. Gaston et al., 2025, Environmental Research
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