Depending on many factors, such as age, weight, sex and activity level, people's Calorie needs vary. The amount of energy, or Calories, the body uses increases as physical activity increases. A combination of physical activity and nutritious eating helps people reach and maintain a healthful weight. Students figure basal metabolism. Basal metabolism requires 60-70 percent of the total energy used by the body.
Energy is needed for heartbeat, respiration, temperature and other functions of the body.
A rough estimate of basal metabolism can be determined by figuring 1 Calorie per kg of body weight per hour. To convert pounds to kilograms, divide the number of pounds by 2.2. Physical activity increases energy needs anywhere from 25-40 percent over basal metabolism requirements. Discuss fad diets. Ask students to name some characteristics of fad diets.