Description: After decades of decline, deaths due to heart disease appear to have leveled off among young men and may be trending upward in young women, according to research released Monday. This is likely due to poor health habits and the growing number of young Americans who are overweight or obese, researchers say. "Young adults should take stock of their lifestyles," Dr. Earl S. Ford, from the Centers for Disease Control and Prevention, Atlanta, noted in a statement. "If you're smoking, you should quit. If you're doing less than 30 minutes of physical activity per day, it's time to find ways to be more active. If you need to lose weight, you should burn more calories than you take in."