Body Composition Unit4 Flashcards Preview

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Flashcards in Body Composition Unit4 Deck (31):
0

Fat mass

Absolute amount of body fat
Includes extract able lipids

1

Fat free mass

Lipid free chemicals
Water bone muscle connective tissue organs

2

Relative body fat percentage

FM expressed as a percentage of total body mass

3

Adipose tissue

Adipose tissue is specialized for storage through triglycerides

4

2 types of fat cells

White-most fat stored in nuclei are flat
Brown-small fat droplets better for generating heat tribal role in weight maintenance

5

Adipocytes

Once fat cells are created they cannot be naturally removed
Size only decreases
Increase in size= hypertrophy
Increase in number= hyperplasia

6

Body fat regulation

Sex hormones
Local factors
Genetics

7

Fat cells

Flows in and out of cells in the form of molecules called fatty acids
Store fat in triglycerides
Glycerol+3fatty acids= triglycerides

8

Lipogenesis

Is the deposition of fat
Converted to triglycerides
Insulin plays a huge role in liopgenic process
Stimulates lipoprotein release

9

Lipolysis

The chemical decomposition and release of fat from adipose tissue
When additional energy is required

10

HSL

Hormone sensitive lipase
Hydrolysis the triglyceride into free fatty acids and glycerol

11

Essential fat

Fat in heart kidneys lungs liver bone marrow muscles
Men 3%
Women12%

12

Storage Fat

Fat accumulation in adipose tissue
12-15%
Total fat=storage+essential

13

Location of adipose tissue

Subcutaneous adipose tissue-beneath the skin
Visceral adipose tissue- internal

14

Direct assessment of body composition

Involves chemical analysis of the body
Human cadaver

15

Body mass index

Body mass divided by height squared

16

Anthropometry

Standard techniques to quantify or predict body size
Limb circumferences height and weight

17

Body density

Body mass per unit of body volume

18

Densitometry

Water displacement to estimate body density

19

BMI

Still does not account for % body fat
Lean muscular can be labeled as overweight

20

BMI classifications for adults

Underweight 30
Class1=30-34.9
Class2=35-39.9
Class3>40

21

Android

Male
Upper body, neck, abdominal
Internal
Hard fat
Apple

22

Gynoid

Female
Lower body, thighs, butt
Subcutaneous
Soft fat
Pear

23

Android vs gynoid

Android = greater risk for cardiovascular disease compared to gynoid

24

Underwater weighing

The gold standard

25

DEXA

Easiest one

26

Air displacement plethysmograph
ADP

Bod pod
Uses air displacement
Mass determined by stepping on scale
Error +-3

27

Skin fold thickness

Ski fold thickness is measured in millimeters with precision CALIPERS
Skin fold is primarily determined by subcutaneous fat layer

28

Bio electrical Impedance Analysis
BIA

BIA is an easily administer technique that determines TOTAL BODY WATER

29

BIA

Lean mass and BF% can then be estimated via prediction equations

Assumes body is a cylinder of constant cross sectional area and uniform density

30

Practical Applications

There is perfect method to assess body composition