chapter 4 body composition 5/23/2015 1. student learning outcomes define body composition &...
TRANSCRIPT
Chapter 4Chapter 4
Body Composition
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Student Learning OutcomesStudent Learning Outcomes
Define body composition & understand its relationship to healthy body weight.
Identify the differences between essential & storage fat.
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Learning OutcomesLearning Outcomes
Explain various techniques used to assess body composition.
Be able to determine recommended weight, and understand the importance of waist-to-hip ratio & BMI.
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Body CompositionBody Composition
Two components
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Essential & Storage FatEssential & Storage Fat
Essential fat
Storage fat
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Essential FatEssential Fat
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Storage FatStorage Fat
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Fat serves 3 basic functionsFat serves 3 basic functions
1.
2.
3.
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IntroductionIntroduction
Assessment of body composition
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Overweight & ObesityOverweight & Obesity
An adult who has a BMI between 25 & 29.9
An adult who has a BMI of 30 or higher is considered obese
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OverweightOverweight
The CDC defines overweight as
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ObesityObesity
According to the CDC, obesity is defined
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Morbid ObesityMorbid Obesity
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OverweightOverweight//ObesityObesity//Morbid ObesityMorbid Obesity
10%More than 100 poundsBMI>30>50% of weightBMI 25 – 29.9>30%
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Typical Body Composition of an Typical Body Composition of an Adult Man and WomanAdult Man and Woman
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Techniques to Assess Body Techniques to Assess Body Composition Composition Dual Energy X-
Ray Absorptiometry (DEXA)– Low-dose x-ray
beams– Measurements – SEE is ± 1.8%
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Techniques to Assess Body Techniques to Assess Body CompositionCompositionAir
displacement– Person sits
inside chamber
– Body volume is determined
– SEE is ± 2.2%
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Techniques to Assess Body Techniques to Assess Body CompositionComposition
Hydrostatic Weighing– For decades has
been the most precise technique used.
– A person’s “regular” weight is compared with weight taken underwater.
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Techniques to Assess Body Techniques to Assess Body CompositionComposition
Hydrostatic weighing– “Regular”
weight vs. underwater weight
Fat buoyancy
– SEE is ± 2.5%– Drawbacks
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Techniques to Assess Body Techniques to Assess Body CompositionComposition
Skinfold thickness– Subcutaneous fat– SEE is ± 3.5%– Use pressure
calipers– Measure 3 to 7
sitesRight side of
body
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Skinfold ThicknessSkinfold Thickness
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Techniques to Assess Body Techniques to Assess Body CompositionCompositionGirth measurements
– Limited equipment necessary– SEE is ± 4%– Three measurements for women
Upper arm, hip, and wrist
– Two measurements for menWaist and wrist
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Bioelectrical ImpedanceBioelectrical Impedance
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Techniques to Assess Body Techniques to Assess Body CompositionComposition
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Disease Risk According to Body Disease Risk According to Body Mass Index (BMI)Mass Index (BMI)
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Mortality Risk Versus Body Mass Mortality Risk Versus Body Mass Index (BMI)Index (BMI)
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Disease Risk According to Disease Risk According to Waist CircumferenceWaist Circumference
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Starting at age 25Starting at age 25
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Is it all about weight?Is it all about weight?
What other factors should you consider?
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1. Accumulate how many minutes/steps of exercise?
2. Exercise at what type of pace?3. What type of training is recommended 2-
3 times per week?4. Use moderation when it comes to…5. Regularly monitor your…6. Do not allow drastic increases in…
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Body weight
Brisk/ fast
Muscular strength
Daily diet
10, 000 steps or 60 min.BP/HDL/LDP &
% body fat
Assess your knowledgeAssess your knowledge
1. Essential fat in women is?2. How many sites are used to
assess body composition?3. An acceptable BMI is
between?4. When a previously inactive
person starts an exercise program, the person may…
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11-14% 27/31%
3 - 7 19 -24
Gain Weight 12-17%
Die
General Body Fat % CategoriesGeneral Body Fat % Categories
1. Essential fat for men?2. Men Athletes?3. Fitness Category for men and
women?4. Acceptable category for men
and women?5. Obesity for men?
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2-4%6-13%
14-17% & 21-24% 18-25% & 22-28%
Plus 25%
Answer questions from chapter 4Answer questions from chapter 4
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