—People visit social networking sites such as Facebook for many reasons, including the positive emotional experience that people enjoy and want to repeat, according to a new study...

People who are more physically active report greater levels of excitement and enthusiasm than people who are less physically active, according to researchers. People also are more likely to report feelings of excitement and enthusiasm on days when they are more physically active...

While many people view Valentine’s Day as a nice, relaxing holiday to be spent with a loved one, it is also a holiday that carries a very high potential for stress with it. In general, Valentine’s Day is quite simple: you write a card for someone you love, and perhaps you swing by Marks & Spencer for a bouquet of flowers or a box of chocolates.

Brooding in your apartment on Saturday afternoon? A new smart phone senses when you're depressed and will nudge you to call or go out with friends. It's the future of therapy at a new Northwestern University Feinberg School of Medicine center where scientists are inventing web-based, mobile and virtual technologies to treat depression and other mood disorders....

Programs that support parents during their child's early years hold promise for obesity prevention, according to a new study in the online February 6 issue of Pediatrics. Today, one out of five American children is obese. Young children who are...