We all get tired. Many of us have felt depressed at times. But the mystery known as chronic fatigue syndrome is not like the normal ups and downs we experience in everyday life.

The more active you are, the more calories you burn. Running or jogging, for instance, burns more calories than bowling.

Most adults who drink alcohol are moderate drinkers and are at low risk for alcohol dependence. If you're concerned about drinking use this tool to find out if you have a problem.

A peak flow meter for asthma is like a thermometer for a fever - it helps you monitor what's going on inside your lungs by measuring airflow out of the lungs. The meter can tell you if your airways are narrowing well before asthma symptoms begin. Learn how to use a peak flow meter, how to find your "personal best," and how to set your peak flow zones.