HFN1O Mr. MacMillan
*Body Composition and Obesity
*Determining the Right Weight for You
*Overweight: increased body weight in relation to height
*Body mass index (BMI): a formula for weight assessment based on a weight-to-height relationship
*Obesity
*Mild: 20 to 40 percent over ideal weight
*Moderate: 41 to 99 percent over ideal weight
*Severe, morbid, or gross: 100 percent or more
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*Assessing Fat Levels
*Body mass index (BMI)
*Weight (kg) / height squared (m2)
*Healthy weight is a BMI of 19 to 25.
*Overweight is a BMI of 25 or more.
*Obese is a BMI of 30 or more.
*What is your BMI?
*What would be problematic about this number?
*Body Mass Index: Are You at a Healthy Weight?
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*Waist Circumference and Ratio Measurements
*Waist circumference should be less than:
*Men: 40 inches
*Women: 35 inches
*Waist-to-hip ratio should be less than:
*Men: 1.0
*Women: 0.8
*Overview of Various Body Composition Assessment
Methods
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* Overview of Various Body Composition Assessment Methods (cont.)
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*Typical Body Composition
*Factors Contributing to Obesity
*Heredity
*Body type and genes
*Twin studies
*Observe twins separated at birth and raised in different environments
*Specific obesity genes
*Ob gene
*Activity Break: Environmental Factors
*List environmental factors that can directly or indirectly contribute to obesity.
*1 to 2 minutes
*We will compile a list.
*Managing Your Weight*Keep weight control in perspective.
*Understand calories.
*Include exercise.
*Improve eating habits.
*Select a nutritional plan.
* The Concept of Energy Balance
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*The “Eat” Response
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Obesity Trends* Among Canadian AdultsHPS, 1985
(*BMI 30, or ~ 30 lbs overweight for 5’4” woman)
Katzmarzyk PT. Can Med Assoc J 2002;166:1039-1040; Statistics Canada 2002/04
No Data <10% 10%-14% 15-19% 20-25% 25+%
Obesity Trends* Among Canadian AdultsHPS, 1990
(*BMI 30, or ~ 30 lbs overweight for 5’4” woman)
Katzmarzyk PT. Can Med Assoc J 2002;166:1039-1040; Statistics Canada 2002/04
No Data <10% 10%-14% 15-19% 20-25% 25+%
Obesity Trends* Among Canadian AdultsNPHS, 1994
(*BMI 30, or ~ 30 lbs overweight for 5’4” woman)
Katzmarzyk PT. Can Med Assoc J 2002;166:1039-1040; Statistics Canada 2002/04
No Data <10% 10%-14% 15-19% 20-25% 25+%
Obesity Trends* Among Canadian AdultsNPHS, 1998
(*BMI 30, or ~ 30 lbs overweight for 5’4” woman)
Katzmarzyk PT. Can Med Assoc J 2002;166:1039-1040; Statistics Canada 2002/04
No Data <10% 10%-14% 15-19% 20-25% 25+%
Obesity Trends* Among Canadian AdultsCCHS, 2000
(*BMI 30, or ~ 30 lbs overweight for 5’4” woman)
Katzmarzyk PT. Can Med Assoc J 2002;166:1039-1040; Statistics Canada 2002/04
No Data <10% 10%-14% 15-19% 20-25% 25+%
Obesity Trends* Among Canadian AdultsCCHS, 2002
(*BMI 30, or ~ 30 lbs overweight for 5’4” woman)
Katzmarzyk PT. Can Med Assoc J 2002;166:1039-1040; Statistics Canada 2002/04
No Data <10% 10%-14% 15-19% 20-25% 25+%
Obesity Trends* Among Canadian AdultsCCHS, 2004
(*BMI 30, or ~ 30 lbs overweight for 5’4” woman)
Katzmarzyk PT. Can Med Assoc J 2002;166:1039-1040; Statistics Canada 2002/04
No Data <10% 10%-14% 15-19% 20-25% 25+%
*Increasing Childhood Obesity Canada, 1981-1996
0
5
10
15
20
25
30
1981 1996 1981 1996
GirlsBoys
Overweight
Obese
*Measured Overweight Ages 2-17 years
CPHI. Promoting Health Weights. 2006.
24
in Motion Ban on Junk Food in Schools
Nutrition North CanadaBuilding on
Existing Strengths
Baby Friendly Initiative
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*Fad Diets
*Research a fad diet and provide details to the class.
*What is the diet composed of?
*Who created it? Where was it found?
*List any interesting information about the diet