Body Mass Index

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Body Mass Index

• Learn the difference between having a high BMI
  and a high Body Fat Percentage.

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What kinds of Illnesses can be caused by having a
high body fat percentage?

• High Cholesterol Levels
• High Blood Pressure
• Coronary Heart Disease

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High Cholesterol Levels

• We have two kinds of cholesterol in our bodies, a
  good kind and a bad kind.
• High Density Lipoprotein (HDL) is the good type
  of cholesterol that goes around your blood
  vessels cleaning them and taking the waste to the
  liver.

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High cholesterol levels

• The bad kind known as Low Density Lipoprotein
  (LDL) is the type of cholesterol that gets stuck
  to your arteries and prevents your blood from
  flowing through.
• This type of cholesterol is increased when we
  consume a lot of fatty foods.
• By having a high concentration of body fat we
  increase the probability of having high
  cholesterol levels.

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High Blood pressure

• Your arteries are like a water hose, if you
  squeeze one end of the hose the water will start
  to build up pressure in order for the water to
  flow through.
• When there is an accumulation of fat in your
  arteries, your heart has to push harder in order
  to get the blood through.
• This is called having a high blood pressure, and
  this affects your body because sometimes your
  arteries cannot take all this pressure and they
  could burst.

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Straw experiment

• Hold a straw to your mouth and blow through it.
• You should be able to blow air very easily
  through the straw.
• Now pinch the middle of the straw and try to blow
  air through it again.
• You have to work harder to try to blow the same
  amount of air through the straw as before, that
  is the same type of effort that your heart has to
  put in order to push blood through the
  constricted arteries.

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Coronary heart Disease

• This disease takes place in the arteries that
  supply the heart with blood and oxygen.
• When these arteries become clogged by a fat build
  up, called arthrosclerosis, it could lead to
  fatal consequences like a heart attack.

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Best way of prevention

• The best way to keep our bodies in check would be
  to know where we stand.
• This is where taking your Body Mass Index or Body
  Fat Percentage would be needed.

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What is Body Mass index (bmi)

• The BMI is a ratio between your height and your
  weight.
• This gives you a number which is then compared to
  the average ratio that a person with such a
  height and weight should have.

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What are the problems with BMI?

• It takes your total weight into account.
• Does not distinguish between muscle and water
  weight.
• It does not distinguish between male or female.
• What do we use now?

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Body fat percentage machine

• This machine sends a small electrical signal
  through your body which measures the amount of
  fat your body has.
• Water conducts electricity faster than fat, and
  so the longer the machine takes to get the signal
  back means that there is more fat in the body.

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Public health

• The field of public health is dedicated to
  researching the different trends in health
  related issues.
• TODAY we are going to become public health
  scientists and graph the trends in BMI and Body
  Fat Percentage in adults who attended a recent
  health fair in North Hills, CA.
• We will also be checking our own BMI and Body Fat
  Percentage.

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Graphs
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How to check body fat percentage!
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BMI

• First you turn on the BMI machine and the word
  guest flashes on the screen.
• Next you press set and it will ask for exercise,
  sex, height, and weight. In order to set the
  right digits you will click the up and down
  buttons and then the set button.

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bmi

• Then make sure the person is standing straight
  and holding the machine with both hands and arms
  stretched out.
• Then you go around and press the start button,
  and wait for the numbers to appear.

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BMI Chart
Body Fat ranges Body Fat ranges Body Fat ranges Body Fat ranges Body Fat ranges Body Fat ranges
Genero Gender Edad Age Bajo Low (BMI lt 18.5) Normal Normal BMI18.5-24.9) Alto/Sobrepeso High/Overweight (BMI 25.0-29.9) Muy Alto/Obeso Very High/Obese (BMI gt 30)
Femenino Female 20-39 lt 21.0 21.0-32.9 33.0-38.9 gt39.0
Femenino Female 40-59 lt23.0 23.0-33.9 34.0-39.9 gt40.0
Femenino Female 60-79 lt24.0 24.0-35.9 36.0-41.9 gt42.0
Masculino Male 20-39 lt8.0 8.0-19.9 20.0-24.9 gt25.0
Masculino Male 40-59 lt11.0 11.0-21.9 22.0-27.9 gt28.0
Masculino Male 60-79 lt13.0 13.0-24.9 25.0-29.9 gt30.0