Environmental Factors Affecting Obesity

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Environmental factors affecting obesity
1. introduction
2. method equipment
3. budget
4. time frame

Calorie Consumption
In America, a changing environment has broadened food options and eating habits. Grocery stores stock their shelves with a greater selection of products. Pre-packaged foods, fast food restaurants, and soft drinks are also more accessible. While such foods are fast and convenient they also tend to be high in fat, sugar, and calories. Choosing many foods from these areas may contribute to an excessive calorie intake. Some foods are marketed as healthy, low fat, or fat-free, but may contain more calories than the fat containing food they are designed to replace. It is important to read food labels for nutritional information and to eat in moderation. Portion size has also increased. People may be eating more during a meal or snack because of larger portion sizes. This results in increased calorie consumption. If the body does not burn off the extra calories consumed from larger portions, fast food, or soft drinks, weight gain can occur. How do portions today compare to portions sizes 20 years ago? The National Institutes of Health have developed a Web site with an interactive quiz to inform people on the increasing portion sizes. Choosing a variety of healthy foods in the correct portion sizes is helpful for achieving and maintaining a healthy weight. The Dietary Guidelines for Americans is a good resource to help people guide their dietary habits.

Calories Used
Our bodies need calories for daily functions such as breathing, digestion, and daily activities. Weight gain occurs when calories consumed exceed this need. Physical activity plays a key role in energy balance because it uses up calories consumed. Physical activity is any bodily movement produced by skeletal muscles that results in an expenditure of energy with a range of activities such as * Occupational work 

Carpentry, construction work, waiting tables, farming
*...
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