The following chart shows the newest recommendations by the National Sleep Foundation. They are based on numerous studies conducted by experts in physiology, sleep and anatomy as well as neurology, pediatrics, gynecology and gerontology:

Even though having an hour less or more sleep from time to time is not serious, making this a habit may lead to serious health problems. These are the 7 reasons why you should pay attention to your sleeping habits:

1. Back Pain

Pain in the back can be pretty debilitating, leaving you in bed and making you unable to move or stand up. Excessive sleep can make you more prone to back pain since it weakens the muscles on your back. So, instead of staying in bed, do some low-intensity exercises to strengthen your back muscles.

2. Obesity

Staying too long in bed can mix up your metabolism, so instead of using energy you will store it. A recent study in which two groups of participants had similar exercise and diet regimens, the group of participants who slept for ten hours a night were more likely to become obese 6 years afterwards than those who slept 8 hours.

3. Depression

Depression impacts the sleep in two ways, manifested by oversleeping or insomnia. About 15% of people who suffer from depression are sleeping excessively. Furthermore, oversleeping can have a negative impact on the mental health and hamper the recovery.