Body Composition Packet (Final) Flashcards
(57 cards)
What is the standard indicator for health status currently?
Body Mass Index (BMI)
How is BMI flawed?
Only measures weight for height, not measuring body fat. Not a good indicator for men!
What is a healthy weight BMI range?
18.5 - 24.9
Overweight BMI? Obese BMI? Morbidly obese BMI?
Overweight: 25-29.9
Obese: 30-39.9
Mor. Obese: Over 40
What are the 3 recommended better indicators of health status?
WC- waist circumference
WHR- waist to hip ratio
WHtR- waist to height ratio
Women have a higher amount of total fat because of the increased essential or storage fat?
Essential, women need 12% for reproductive purposes whereas men only need 3%
Skin fold tests only measure ___ fat.
Subcutaneous (visceral is the more concerning fat deposition)
What are some of the stipulations for using bioelectrical impedence?
Must be well hydrated to conduct electricity
Don’t exercise 4-6 hours prior
No caffeine, alcohol, or diuretics 24 hrs prior
Is fat a good conductor or a poor conductor?
Poor conductor; muscle and organs are good conductors (Basis for bioelectric impedence test)
Underwater weighing is a good measure for body fat but where is it prone to error?
There is always residual air in lungs and GI tract that cannot be accounted for
How does the air displacement test work? (Bod Pod)
Measures the change in pressure due to the volume of person. (Less accurate than underwater weighing)
T/F: DEXA scans are highly accurate and reproducible and there is no exposure risk to patients.
False: DEXA is dual energy x-ray absorptiometry, so there is x-ray exposure
What is our basal metabolism?
Energy we use to breath, regulate body temp and for heart to beat
What is the thermic effect of food?
The energy it takes to digest, absorb, metabolize, and store nutrients of food.
Activity ____ is another way of saying energy expenditure from physical exercise.
Activity thermogenesis
How much of our total energy expenditure is from the thermic effect of food?
10%
What has the highest E expenditure for digestion: carbs, lipids, or proteins?
Proteins (20-30% increased E) Then carbs (5-10% increased E) Then lipids (0-5% increased E)
What accounts for the largest chunk of energy expenditure: Thermic Effect, Basal Metabolic Rate, or Activity Thermogenesis?
Basal metabolic rate = 60-70% of total E expenditure
remember Thermic was 10% and Activity thermogenesis is 20-40%
What equation did we use to estimate resting metabolic rate?
Mifflin- St. Jeor Equation
Leptin stimulates the release of __ ___ ___, a neuropeptide which suppresses hunger.
Melanocyte Stimulating Hormone (MSH)
T/F: Neuropeptide Y stimulates hunger.
True
___, made in the stomach and small intestine, signals hunger.
Ghrelin (think ghrelin=stomach growling)
Leptin, a hunger suppressant, is made where?
Adipose tissue
Cholecystokinin (CCK) and Insulin both __ hunger.
Suppress