The most successful weight loss program combines calorie reduction, increased physical activity, and when appropriate, behavior therapy to improve eating and exercise habits. Obesity is more prevalent in some minority populations than among white Americans. These groups include African Americans, especially women, Mexican and Puerto-Rican Americans, some other Hispanic populations, many Native American groups, and those of Pacific Island ancestry. Americans are consuming about 300 more calories per day than 20 years ago. More of us are eating out more often.
Portion sizes are larger.
Low fat products are everywhere, and many people believe that low fat is healthy and therefore can be consumed freely without regard to quantity. Many Americans ignore calories and fail to get enough exercise. Another possible cause for the increase in obesity is Americans' obsession with fat in the diet and attempting to eliminate or reduce it by overeating low fat foods. However, many low-fat foods are actually higher in calories than regular fat versions. Physical activity counts too.