healthy body weight

Question 1

BMI

Answer 1

body mass index - relative weight for height

Question 2

why is BMI a crude measure

Answer 2

does not account for differences in body composition
Racial differences in body fat for same BMI
obesity: excessive body fat
associated with health risk

Question 3

Waist circumference:

Answer 3

a surrogate measure of abdominal fat
women < 88 (35”), men <102 (40”)

Question 4

Body composition assessments:

Answer 4

skinfolds, bioelectrical impedance analysis (BIA)

Question 5

% Body Fat: healthy range

Answer 5

women: 12-31%
men: 6-24%

Question 6

etiology

Answer 6

is complex and multifactorial
1. Behavioural
food intake & physical activity
2. Environmental
Toxic food environment - that does not support PA
3. Psychosocial
Socioeconomic status, social factors
4. Genetics/ endocrine influences
300+ & biological markers linked to obesity

Question 7

why should we not diet

Answer 7

extreme energy reduction will slow metabolism
< 1200 kcals- risk of dietary deficiency

Question 8

Weight cycling

Answer 8

Your diet goes around diet, metabolism slows down, end of diet, normal eating, weight gain, back to diet to start again

Question 9

too little body fat

Answer 9

<18.5 BMI