One pound of body fat equals about 3500 calories

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One pound of body fat equals about 3,500 calories. Eating 500 fewer calories per day than you need to maintain your weight will result in the loss of one pound of body fat after one week (500 calo- ries per day 7 days 3,500 calories). Burning an additional 500 calories per day through physical activity would result in a sim- ilar weight loss. Determining Your Appropriate Weight Range our appropriate weight is influenced by several factors, Y including gender, age, height, body frame, growth rate, metabolic rate, and activity level. As a teen you are still growing, so you need more calories than an adult does. Tall and large-framed people need more calories than short and small-framed people. Because an active person burns more calories than a sedentary person does, he or she can consume more calories without gaining weight than a sedentary person can. Body Mass Index One way to evaluate whether your weight is within a healthy range is to determine body mass index. is a ratio that allows you to assess your body size in relation to your height and weight. Because BMI for children and teens takes age and gender into account, different charts are used for males and females. Figure 6.1 on page 146 explains how to determine your BMI. A different chart is used for adults. As you calculate your BMI, keep in mind that many different ratios of height to weight can be healthy. Teens grow at different rates and in different ways. There is no single size, shape, or growth pattern that’s normal for everyone. Body mass index (BMI) 145 Lesson 1 Maintaining a Healthy Weight A dding just 100 extra calories to your daily food intake without changing your activity level will add 10 pounds to your weight in one year. Height and gender are two factors that need to be considered when evaluating a person’s weight.
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D ETERMINING BMI Body Composition ody composition, or the ratio of body fat to lean body tissue, B needs to be taken into account when assessing weight. Diet and fitness affect a person’s body composition. For example, a weight-lifting program will increase muscle mass. A high-calorie diet can increase the amount of stored body fat. Body Weight versus Body Fat The terms overweight and obese are often used interchangeably, but they are not the same. is a condition in which a person is heavier than the standard weight range for his or her height. refers specifically to having an excess amount of body fat . Both can endanger health, but in certain cases being overweight may not pose health risks. Athletes such as bodybuilders or football players may be overweight because of excess muscle tissue rather than excess body fat. Weight-Related Health Risks MI for adults serves as a general guide for evaluating some health B risks. Adults with high BMIs are at increased risk of cardiovas- cular disease; type 2 diabetes; cancer; high blood pressure; and osteoarthritis, a joint disease. Maintaining a healthy weight can help promote health and prevent the development of these diseases.
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