Sleep Duration¶

Epidemiological studies show a U-shaped relationship between sleep duration and mortality risk:

• 7–8 hours per night is optimal for most adults.
• Less than 7 hours: increased risk of chronic disease and early mortality.
• More than 9 hours: also associated with higher mortality risk.

Tips to Achieve Optimal Duration¶

• Set consistent bedtime and wake-up time.
• Track your sleep to understand your natural patterns.
• Adjust gradually: shift your bedtime by 15–30 minutes if needed.