Nutrition

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Nutrition

• Chapter 5
• Lesson 1

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What is Nutrition?

• Nutrition- The process by which the body takes in
  and uses food.
• Calories- Units of heat that measure the energy
  used by the body and the energy that food supply
  to the body.
• Nutrients- Substances in food that your body
  needs to grow, to repair itself, and to supply
  you with energy

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Metabolism, What is it and What does it do?

• Metabolism converts the fuel in the food we eat
  into the energy needed to power everything we do.
• From moving to thinking to growing.

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Gaining and Losing Weight

• Just as a car stores gas in the gas tank until it
  is needed to fuel the engine, the body stores
  calories - primarily as fat. If you overfill a
  car's gas tank, it spills over onto the pavement.
  Likewise, if a person eats too many calories,
  they "spill over" in the form of excess fat on
  the body.

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Gaining and Losing Weight

• The number of calories a person burns in a day is
  affected by 1) How much that person exercises, 2)
  The amount of fat and muscle in his or her body,
  and 3) The person's Basal Metabolic Rate (BMR).

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Basal Metabolic Rate

• Basal Metabolic Rate, or BMR, is a measure of the
  rate at which a person's body "burns" energy, in
  the form of calories, while at rest.
• BMR is the minimal amount of calories the body
  needs to survive.
• The BMR can play a role in a person's tendency to
  gain weight.

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What factors influence a persons BMR?

• To a certain extent, a person's basal metabolic
  rate is inherited
• Exercising more will not only cause a person to
  burn more calories directly from the extra
  activity itself, but becoming more physically fit
  will increase BMR as well.
• People with more muscle and less fat generally
  have higher BMRs.
• Why?

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Body Mass Index Chart
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Show Metabolism video