Body Composition

Question 1

FFM =

Answer 1

fat free mass

ie. muscle, bone, water, organs, other

differs from lean mass

Question 2

fat mass =

Answer 2

adipose tissue

Question 3

optimal levels of fat mass in:

men:

women:

Answer 3

men: ~12-18% of TBW
women: ~18-23% of TBW

Question 4

Ways to asses body comp: (4)

Answer 4

• dexa scan (best)
• bod pod = plethysmography
• hydrostatic weighing (most accurate of easy access methods, 2-3% error. Compares weight on land with weight in water
• skinfold test

Question 5

test that estimates body composition

• assumes 50% of fat lies under the skin
• uses caliper, measured in mm

measurements are usually taken on right side of body, standing

Answer 5

skinfold test

Question 6

skinfold test in men measures these 4 areas

Answer 6

• chest
• triceps
• subscapular
• upper thigh

Question 7

skinfold test in women measures these 3 areas

Answer 7

• triceps
• suprailium
• abdominal

Question 8

electric flow is facilitated through hydrated fat-free tissue and extracellular water compared to fat tissue due to the greater electrolyte content of the fat-free component

resistance to electrical current is inversely related to the composition of water within body

fat = increased resistance

Answer 8

bioelectrical impedance

Question 9

_______ ratio indicates central obesity

Answer 9

waist to hip circumference

waist measured at umbilicus

hips at widest part

Question 10

compares relative weight for height

weight (kg)/height(m2), or

weight (lb)/height (in2) x 703

Answer 10

BMI Body Mass Index

Question 11

BMI standards

men:

women:

Answer 11

men: >25kg/m2 = obese
women: >27kg/m2 = obese

Question 12

To lose 1 pound of weight, you must have a net caloric deficit of __#__ kcals

Answer 12

3500 kcals

Question 13

to lose one pound in one week, how many kcals must one cut from their diet everyday?

Answer 13

500 kcals/day