It’s time for New Year’s resolutions. One of the most popular goals: a new diet. There’s no doubt that the number of obese Americans has increased dramatically over the last 25 years – putting them at risk of high blood pressure, diabetes, heart disease, and osteoarthritis. But Cathy Roy (Longwood University) says it’s not necessarily the fat making people sick. Her research suggests a lack of physical activity might be more to blame. Also featured: Water might help you lose weight. The latest research shows that drinking two 8 oz. glasses before each meal helps decrease calorie intake. Brenda Davy (Virginia Tech) investigates lifestyle strategies that prevent obesity – and her latest studies about the role of water in diets are making a huge splash. And also featured: Don’t let the economy get you down this year. Psychologist Holly Schiffrin (University of Mary Washington) suggests that lifestyle changes brought on by the recession might actually be better for our well-being. She says one of the surest ways to find happiness doesn’t have to cost a nickel: spending time with friends and family.