Fifty to 70 million Americans suffer frominsomnia. It’s more common among women. It is also common among people who are obese or have high blood pressure, anxiety or depression.
Lack of sleep can affect your immune system. Your body needs sleep to fight infectious diseases.
Long-term lack of sleep also increases your risk of obesity, diabetes, and heart and blood vessel (cardiovascular) disease.
The optimal amount of sleep for most adults is seven to eight hours of good sleep each night. Teenagers need nine to 10 hours of sleep. School-aged children may need 10 or more hours of sleep.