Poor sleep deadlier than unhealthy diet or inactivity, warns study

Adequate sleep supports heart function and blood pressure regulation, reducing cardiovascular risks.

• Insufficient sleep linked to shorter lifespan, stronger than diet or exercise
• Study finds sleeping less than 7 hours nightly predicts reduced life expectancy
• Researchers recommend 7 to 9 hours of sleep for long-term health benefits

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For many, sleep is treated as a negotiable luxury, easily sacrificed for work, socialising, or late-night scrolling. But a recent study from Oregon Health & Science University reveals that skipping sleep doesn’t just make you tired, it could decrease years of your life.

The research team analysed Centers for Disease Control and Prevention (CDC) survey data spanning six years, comparing county-level sleep patterns with life expectancy across the United States. They found that sleep duration correlated with lifespan more strongly than diet, exercise, or social connections, and only smoking proved a greater risk. “I didn’t expect it to be so strongly tied to life expectancy,” said Dr. Andrew McHill, associate professor at OHSU. “It really underlines the fact that sleep isn’t optional, it’s a cornerstone of health.”

The study represents the first attempt to track year-by-year sleep trends against life expectancy across every U.S. state. Using the CDC definition of sufficient sleep, at least seven hours per night, researchers discovered the link which said those who regularly slept less than seven hours were far more likely to have shorter lives, regardless of location or year. McHill added, “Even among people who exercise well or eat carefully, insufficient sleep still emerged as a major predictor of reduced lifespan.”

Also read: Doctor says these 3 medicines can save a heart attack patient

Understand why sleep matters for a longer life

Heart and circulatory health

Adequate sleep supports heart function and blood pressure regulation, reducing cardiovascular risks.

Immune system boost

Sleep strengthens immune defences, helping the body fend off infections and chronic disease.

Brain performance and repair

The brain uses sleep to consolidate memory, clear waste, and regulate mood and cognition.

Longevity over lifestyle factors

Sleep showed a stronger link to lifespan than diet or exercise in this nationwide study.

Seven to nine hours is key

Researchers recommend aiming for seven to nine hours nightly, the “sweet spot” for long-term health.

Also read: Third-hand smoking puts children and elderly at home at risk, expert lists tips to protect against its toxic effect

This research suggests that consistently getting enough rest could be the single most effective strategy to extend lifespan outside of quitting smoking. McHill shares; “People often postpone sleep or treat it as flexible, but these findings make it clear: what you don’t do at night can silently affect how long you live.”

FAQs on importance of healthy sleep cycle:

1. What is a healthy sleep cycle?

A healthy sleep cycle follows a regular pattern of falling asleep and waking up, allowing the body to complete all sleep stages.

2. Why is a regular sleep schedule important?

It supports hormone balance, metabolism, mental clarity, and overall physical health.

3. How does a healthy sleep cycle affect mental health?

It improves mood, concentration, memory, and reduces stress and anxiety.

4. Can poor sleep cycles affect immunity?

Yes, irregular or poor sleep weakens the immune system and increases illness risk.

5. How can one maintain a healthy sleep cycle?

Stick to consistent sleep times, limit screens before bed, and create a calming bedtime routine.

Disclaimer: This article, including health and fitness advice, only provides generic information. Don’t treat it as a substitute for qualified medical opinion. Always consult a specialist for specific health diagnosis.