Getting good, regular sleep is very important for staying healthy. But many people still don’t know exactly what “good sleep” really means or how much it affects their overall health. A new study from China has found a strong connection between poor sleep and more than 170 different diseases, including dementia, Parkinson’s, and type 2 diabetes.
This important research, now published in the journal Health Data Science, has become one of the Daily news highlights around the world. It shows that sleep problems may play a much bigger role in serious health issues than we thought before.
Study Shows Strong Link Between Sleep and 172 Diseases
Dr. Qing Chen, a researcher at the Third Military Medical University in China, said scientists are still learning how sleep helps the body stay healthy. He explained that while we know bad sleep is harmful, we don’t fully understand how or why. For example, it’s still not clear when the best time to sleep is, or how long we really need.
In the new study, Dr. Chen and his team looked at sleep habits and health records from more than 88,000 adults in the UK Biobank database over an average period of 7 years. The results were eye-opening:
- 172 diseases were connected to poor sleep habits
- 92 of those diseases had more than 20% of their risk linked to poor sleep
- 42 diseases had double the risk for people with bad sleep patterns
Some of the major health problems found to be linked with poor sleep include:
- Dementia
- High blood pressure (primary hypertension)
- Parkinson’s disease
- Type 2 diabetes
- Liver damage and kidney failure
Sleep Schedule Matters More Than Just Sleep Hours
Many people think that sleeping longer is the key to better health. But this study found that sleep regularity—going to bed and waking up at the same time every day—is even more important than just sleep duration.
Dr. Chen said, “Even if you sleep long enough, irregular sleep patterns may still lead to health problems. That’s because sleep timing and sleep duration affect different parts of our health.”
Doctors and scientists now believe that keeping a regular sleep schedule could lower the risk of many serious illnesses.
Doctors Say More Research Is Needed
Dr. Matthew Scharf, a sleep medicine expert from Hackensack Meridian Health in New Jersey, said this study is powerful because of the large number of people it included and the strong data. But he also added that this study shows a connection, not necessarily a direct cause.
He explained, “Just because poor sleep is linked with these diseases doesn’t mean it causes them. We need more research to find out if fixing sleep patterns can actually prevent or improve these health problems.”
One example he gave was Parkinson’s disease. If doctors help patients stick to a regular sleep routine, could that reduce their symptoms or improve their quality of life? That’s what researchers want to find out next.
Sleep Affects Almost Every Part of the Body
Other experts also agreed with the study’s findings. Dr. Daniel Truong, a neurologist from California, said that sleep is very important for every part of the body—especially the brain, heart, immune system, and hormones. He added that, unlike your genes or your age, your sleep habits can be changed, which means people can take control of their health.
Dr. Katie McCullar from Harvard Medical School added that good sleep supports your mental, emotional, and physical health. She said more people—and more doctors—need to treat sleep as a key part of staying well.
Simple Tips to Improve Your Sleep and Stay Healthy
If you’re having trouble sleeping, you’re not alone. Around 10% of people worldwide suffer from chronic insomnia, and 20% experience occasional sleep problems.
Dr. Jimmy Johannes, a sleep expert from California, shared some helpful tips for better sleep:
- Go to bed and wake up at the same time every day
- Keep your bedroom cool, dark, and quiet
- Avoid bright lights or screens before bedtime
- Get sunlight exposure during the day
- Avoid caffeine or large meals before sleep
He also advised: “If you snore loudly, wake up feeling tired, or feel sleepy during the day, talk to a doctor. You could have a sleep disorder like sleep apnea or a mood problem that’s affecting your sleep.”
