Weekly changes in social jetlag, its mismatch with natural daylight, and links to sleep and activity in a long-term Chinese wearable study

Sleep-corrected social jetlag (SJLsc) is associated with variations in work-rest schedules and solar time zone.

• SJLsc may vary based on individual work-rest schedules.
• The timing of solar time zones could influence SJLsc levels.
• SJLsc is associated with sleep patterns and physical activity.
• Variations in SJLsc may relate to nocturnal heart rate variability.

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