Importance of sleep

This article discusses a survey of Americans and New Years resolutions. I don't have access to the study, only the article that describes it. The article says that more half of respondents prefer a resolution of more sleep than going to the gym. Seems fairly obvious to me. Exercising is hard, but sleeping (usually) isn't. The article goes on to detail how sleep is viewed as important to many Americans. Again, fairly obvious responses. Since we all have to sleep, and we do it for about one-third of our life, it's going to be pretty important to humans. Right up there with eating, drinking, and shelter.