Shaking his head to clear it (why should missing one night's sleep affect him so?)

Researchers believe that sleep affects learning and memory in two ways:

Studies show that sleep affects physical reflexes, fine motor skills, and judgment, too.

Getting less or more than the six to eight hours recommended sleep increases the speed of cognitive decline and affects abilities such as reasoning and vocabulary.

How do my sleep and rest patterns affect my headaches?

In the early weeks, your baby's sleep, or lack of it, will be affecting you.

They enjoy a 35-hour work week and generous vacations, yet 56 percent complain that a poor night's sleep has affected their job performance, according to the ministry.

Problem is, missing sleep repeatedly affects every part of your life - from relationships with friends, to your ability to concentrate at school, to your mood.

To help you understand how sleep affects you personally, let's look at how sleep works.

Too little sleep can affect your weight, your nutrition, and your fitness level.