exam 3 ch 20

Question 1

3 components of body build

Answer 1

muscularity
linearity (symmetry)
fatness

Question 2

what determins body size

Answer 2

height and weight

Question 3

what does body composition refer to

Answer 3

chemical composition of the body
fat mass
fat free mass

Question 4

3 models of body composition

Answer 4

chemical
anatomical
two-compartment (fat mass, fat free mass)

Question 5

what does desitometry (hydrostatic weighing) measure

Answer 5

body density
muscle is heavier than water
fat is lighter than water

Question 6

limitations of hydrostatic weighing

Answer 6

lung air volume confounding
conversion errors
fat free density variabel

Question 7

measured on a regular scale

Answer 7

body mass

Question 8

measured using hydrostatic weighing accounting for water density and air trapped in lungs plus GI air

Answer 8

body volume

Question 9

equation for body density

Answer 9

body mass/body volume

Question 10

% body fat =

Answer 10

(495/body density)-450

Question 11

what does DEXA stand for

Answer 11

dual energy Xray absorptiometry

Question 12

measures quantification of bone and soft tissue composition

Answer 12

DEXA

Question 13

measures air displacmenet (instead of water)

Answer 13

air plethysmography (BOD POD)

Question 14

margin of error for skinfold technique

Answer 14

3%

Question 15

what is increase in fat free mass good for

Answer 15

power, strength, muscle endurance

not good for aerobic endurance

Question 16

inappropriate use of weight standards

Answer 16

abused by coaches and players
can lead to decrease in performance and eating disorders

Question 17

risk with severe weight loss

Answer 17

dehydration
chronic fatigue
female athlete triad
disordered nutrition
menstrual dysfunction
bone mineral loss

Question 18

what are the 3 components of the female athlete triad

Answer 18

eating, menstrual and bone disorders

usually seen with women in lean-physique, low-body-weight or endurance sports

Question 19

Appropriate weight standards

Answer 19

inappropriate standard risky for athlete health
look at body composition not total body weight
optimal range of percent body fat
recognition of sex differences

Question 20

optimal weight loss

Answer 20

decrease fat mass increase fat free mass
caloric deficit 200-500 kcal/day
lose no more than 1-3 points a week