E3 Maintaining Body Weight

Question 1

what is optimal body fat

Answer 1

-men: 8-19%
-women: 21-32%

Question 2

how can optimal body weight be calculated

Answer 2

using percent body fat and weight

Question 3

what is and how is fat free weight calculated

Answer 3

-(amount of total weight of bones, muscles and organs, also called lean muscle mass)

Calculation:
%total BW- % Fat weight
Eg: a young man 185 lb who has 25% body fat
– 100% - 25% = 75% lean muscle mass
– 0.75 x 185 lb = 138.8 lb

Question 4

how do you calculate optimal body weight?

Answer 4

*based on healthy body fat percentages
-fat-free weight / (1-optimal% fat) = optimum weight

Question 5

what are the essential body fat percentages for men and women?

Answer 5

women: 8-12%
men: 3-5%

Question 6

what are the factors that influence weight management?

Answer 6

-hormonal control of appetite
-heredity
* Lifestyle and environment
– Emotional stressors
– Increase in fast food
– Ingrained eating habits
* Physical activity and exercise
– Increases daily energy expenditure
-perimenopause/menopause

Question 7

how does hormonal control of appetite influence weight

Answer 7

– Appetite control center—hypothalamus in brain
– Circulating hormones influence appetite
▪ Ghrelin stimulates appetite
▪ Leptin and peptide YY suppress appetite

Question 8

how does heredity influence weight management?

Answer 8

– Genes instruct cells to make proteins that control
metabolism
▪ Influence appetite by regulating control center
▪ Play a key role in resting metabolic rate

Question 9

what is the energy needed to loose a pound