Healthful Body Weight Flashcards
Define morbid obesity (2)
Body weight exceeding 100% of normal
Very high risk for serious health consequences
Define obesity
Having an excess of body fat that adversely affects health
What is BMI?
Ratio of a persons weight to the square of his or her height
How is BMI calculated?
Kg/(m x m)
BMI values below ____ or above _____ have increased health risks
18.5
30
What is one of the downfalls of BMI?
Does not account for body composition
Name methods that can be used to measure body composition (5)
Underwater weighing Skinfold Bioelectric impedance analysis DXA Bod pod
What is the static energy balance equation?
Energy intake = energy expenditure
How many kcal per gram in alcohol?
7
An excess intake of approx ______ kcal will result in a gain of 1 pound
3500
What are the components of total 24 hour energy expenditure?(3)
Basal metabolic rate
Thermic effect of food
Energy cos of physical activity
What is direct calorimetry?
Method that measures the amount of heat the body releases
How does indirect calorimetry work?(2)
Estimates energy expenditure by oxygen consumption (VO2) and carbon dioxide (CO2) production
For a mixed diet, 1 litre oxygen consumed = energy expenditure of ____ kcal
4.81
What is doubly labelled water?(2)
A form of indirect calorimetry used to determine free living EE in humans
What is basal metabolic rate?
Energy expended to maintain resting functions of the body
What is the primary determinant of BMR?
Amount of lean body mass
Factors that increase BMR (7)
High lean body mass Greater height Younger age Elevated thyroid hormone Stress Male Stimulant drugs