Obesity

It seems like fast food is almost a daily topic in the news. Whether it is because of their ingredients (such as trans fat), the negative health effects (like diabetes), or being linked to obesity, fast food dominates the headlines. This then begs the question, "Does fast food cause obesity?" The simple answer is no. Consuming more calories from food than the body can burn is what causes weight gain. This means that you could eat fast food on a regular basis and not become obese. In fact, you can even lose weight while eating fast food. This, however, requires knowledge of not only how many calories you are burning on a daily basis, but also the calories in the food that you are eating. What Does the Research Say? Fast food is not the cause of obesity in today's society. However, because fast food is typically high in calories and the portions are large, it does promote eating too many calories, which can lead to weight gain and obesity. Beside "fast food" there are another causes of obesity: Lack of Energy Balance A lack of energy balance most often causes overweight and obesity. Energy balance means that your energy IN equals your energy OUT. Energy IN is the amount of energy or calories you get from food and drinks. Energy OUT is the amount of energy your body uses for things like breathing, digesting, and being physically active. Overweight and obesity happen over time when you take in more calories than you use. An Inactive Lifestyle Many people aren't very physically active. One reason for this is that many people spend hours in front of TVs and computers doing work, schoolwork, and leisure activities. In fact, more than 2 hours a day of regular TV viewing time has been linked to overweight and obesity. Environment Our environment doesn't support healthy lifestyle habits; in fact, it encourages obesity. Some reasons include: •Lack of neighborhood sidewalks and safe places for recreation. Not having area parks, trails, sidewalks, and affordable gyms makes it hard for people to be physically active. •Oversized food portions. People are exposed to huge food portions in restaurants, fast food places, gas stations, movie theaters, supermarkets, and even at home. Some of these meals and snacks can feed two or more people. Eating large portions means too much energy IN. Over time, this will cause weight gain if it isn't balanced with physical activity. •Lack of access to healthy foods. Some people don't live in neighborhoods that have supermarkets that sell healthy foods, such as fresh fruits and vegetables. Or, for some people, these healthy foods are too costly. Genes and Family History Studies of identical twins who have been raised apart show that genes have a strong influence on a person's weight. Overweight and obesity tend to run in families. Your chances of being overweight are greater if one or both of your parents are overweight or obese. Your genes also may affect the amount of fat you store in your body and where on your body you carry the extra fat. Because families also share food and physical activity habits, a link exists between genes and the environment. Health Conditions Some hormone problems may cause overweight and obesity, such as underactive thyroid (hypothyroidism), Cushing's syndrome, and polycystic ovarian syndrome (PCOS). Underactive thyroid is a condition in which the thyroid gland doesn't make enough thyroid hormone. Lack of thyroid hormone will slow down your metabolism and cause weight gain. You'll also feel tired and weak. Cushing's syndrome is a condition in which the body's adrenal glands make too much of the hormone cortisol. Cushing's syndrome also can develop if a person takes high doses of certain medicines, such as prednisone, for long periods. People who have Cushing's syndrome gain weight, have upper-body obesity, a rounded face, fat Emotional Factors Some people eat more than usual when they're bored, angry, or stressed. Over time, overeating will lead to weight gain and may cause overweight or obesity. Smoking Some people gain weight when they stop smoking. One reason is that food often tastes and smells better after quitting smoking. Another reason is because nicotine raises the rate at which your body burns calories, so you burn fewer calories when you stop smoking. However, smoking is a serious health risk, and quitting is more important than possible weight gain. Lack of Sleep Research shows that lack of sleep increases the risk of obesity. For example, one study of teenagers showed that with each hour of sleep lost, the odds of becoming obese went up. Lack of sleep increases the risk of obesity in other age groups as well. People who sleep fewer hours also seem to prefer eating foods that are higher in calories and carbohydrates, which can lead to overeating, weight gain, and obesity. Sources: http://www.nhlbi.nih.gov... http://weight-loss.emedtv.com...