Chapter 9

St. Francis Prep.

Nutrition - Mrs. Turner


Energy - the capacity to do work, measured in kcalories, the power to effect physical change

Mechanical - energy- movement

Chemical energy - metabolic reactions

Electrical - energy- generated by nerve cells

Basal metabolic rate-BMR- # of calories (energy) you use when at rest while maintaining life sustaining activities


  • body size- tall
  • age- infancy and adolescence adulthood goes down
  • sex males
  • health status- fever pregnancy thyroid


  • overweight
  • underweight
  • obese
  • severely obese

HEALTH RISKS OF TOO MUCH BODY FAT-psychosocial problems

-other problems


-impact on fitness and well being

Name_________________________________________________ Sheet 17-2


Case History: Barbara is 23 years old and has recently graduated from college with a degree in sales and marketing. Throughout the last two years of college, she worried about her grades and found a few courses very difficult. As a result, she studied a lot and made little time for any kind of physical activity. She also became nervous and began to eat more than usual. By the time her senior year began, she had gained about 25 pounds and had to buy a lot of new clothes because the old ones no longer fit. During her senior year, she tried to get into a new routine but found it difficult to do. She purchased special diet books and diet foods, but they just did not help much. She tried participating in some of the sports she liked, but found she was not as good as she used to be and became discouraged. She moved more slowly, got winded quickly, and was simply out of practice. Barbara became overly self-conscious about her weight and began to keep to herself. She continued to overeat and gain weight. At graduation, she weighed 30 pounds more than what she should. She began to worry about getting a job in her profession, because she realized that personal appearance is very important in making sales. She had also heard that some employers are reluctant to hire people who are considerably overweight because they are more likely to develop certain disorders and diseases.

Directions: Identify Barbara's current and future problems in each category below. Then, on the back of this sheet, write a general weight-reduction plan for Barbara.







Barbara's principal problem:


Name__________________________________________ Quiz Sheet 17-1



1. One is considered obese if one is greater than ___________ over the ideal for one's weight and height and body frame size.

a. 5percent

b.10 percent

c.20 percent

d. 2S percent

2. Which of the following guidelines should not be used when trying to reduce one's weight?

a. The diet should be deficient in calories compared to one '5 energy needs.

b. The diet should eliminate at least one of the following: carbohydrates, proteins, and fats.

c. The diet should be one that can be used over a long period of time.

d. The diet should be reasonable in cost.

3. What is the purpose of taking a skinfold measurement?

a. To measure the amount of muscle an individual has

b. To determine if an individual can run a mile

c. To measure the amount of water a person has in his or her body

d. To determine if an individual has too much body fat

4. Susan went on a diet that recommended eating the correct number of servings from each of the food groups in the "Daily Food Guide." The diet emphasized eating a small amount of fat. It also encouraged high-protein foods and grapefruit because these foods will burn off body fat directly. What is the matter with this diet?

a. It recommends eating fat.

b. It claims certain foods will burn off excess fat.

c. The Milk-Cheese group should be excluded from a good diet.

d. There is nothing wrong with this diet.

5. Obesity may result due to an excess intake of:

a. Carbohydrate, protein, and fat

b. Protein and fat

c. Fat only

d. Carbohydrate only

6. Obesity is a risk factor for:

a. Stroke

b. Low blood pressure

c. Tuberculosis

d. Lung cancer

7. Which disease is not associated with obesity?

a. Bronchitis

b. Adult-onset diabetes

c. Arthritis

d. Heart disease


Name__________________________________________ Date______________________________________

Calories AND BMR (DN-64)

DIRECTIONS: Listed below is an explanation of basal metabolic rate (BMR) and how to estimate it for yourself. Figure your BMR and answer the questions.

Basal metabolic rate (BMR) is the rate at which you use energy when completely at rest. BMR varies according to age, sex, weight, and body size and shape. To get a rough estimate of your BMR in calories per day:
Example (100 pound girl)
1.Take your weight and add a zero  
2. Add your weight to that figure
+ 100
3. This is your approximate BMR  
1,100 cal/day
Example (150 pound Boy)
1.Take your weight and add a zero  
2. Double your weight and add it
This is your approximate BMR  
1,800 cal/day

Calories are a measure of heat energy released when nutrients are burned or broken down. The more calories a food has, the more energy it contains. The number of calories a person needs in a day depends on many factors, such as amount of activity, air temperature, and BMR.

There are 3,500 calories in a pound of fat. To lose a pound, you would have to burn up 3,500 more calories than you consume. 'Ib gain a pound, you would have to eat 3,500 more calories than you burn.

1. How is it possible to have a high calorie/low nutrient diet?


2. Does an active person need more or fewer calories per day? Explain.


3. How might outside air temperature affect calorie burning?




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