Narrator: This is Science Today. Some of you may have already noticed that the older you get, the harder it is to sleep properly. David Claman, director of a University of California, San Francisco sleep clinic, says there are several reasons why.
Claman: Part of it has to do with that people, when they're older, have more medical problems and either the medical problems or the treatments with medicines for the medical problems can all affect sleeping in different ways - breathing problems, painful conditions, anything that makes a patient have to urinate more often, all those can disturb sleeping.
Narrator: And while caffeine, alcohol and too much napping often disrupt sleep, Claman believes the most common problem is purposeful sleep deprivation.
Claman: People think they have too many other things to do and they can't afford to sleep as long as they really need to and what I stress to people is to take sleep seriously as an important factor in their lives that will help them live a better life and feel better during the daytime.
Narrator: For Science Today, I'm Larissa Branin.