Jan 1 Body Comp Assessment Flashcards
What is the most common measure of obesity?
BMI = weight (kg) / height (m²)
Relationship between BMI and Mortality Risk:
Very Low BMI (_____): _____ risk.
Normal BMI (_____ - _____): _____ risk.
Overweight BMI (_____ _____): Increased risk.
Obesity BMI (_____): Higher mortality risks, categorized as:
Class I (_____ -_____): High risk.
Class II (_____ -_____): Very high risk.
Class III (_____): Extremely high risk.
Relationship between BMI and Mortality Risk:
Very Low BMI (<18.5): Increased risk.
Normal BMI (18.5-24.9): Least risk.
Overweight BMI (25-29.9): Increased risk.
Obesity BMI (>30): Higher mortality risks, categorized as:
Class I (30-34.9): High risk.
Class II (35-39.9): Very high risk.
Class III (>40): Extremely high risk.
Body components: Divided into _____ mass and _____ mass (E.g. _____).
Body components: Divided into fat mass and fat-free mass (bone, organs, muscles, connective tissues).
Densitometry:
Formula: _____ = _____ / _____ (uses _____’ Principle).
Visible Human Project =
Densitometry:
Formula: Density = Mass / Volume (uses Archimedes’ Principle).
Visible Human Project = 3D reconstruction of 2 humans (male and Female), Flash-frozen and sliced into 1mm slices
Imaging Techniques:
MRI =
CT = 3 facts
Imaging Techniques:
Magnetic Resonance Imaging (MRI) = Expensive and labour-intensive
Computed Tomography (CT) uses radiation to examine specific tissues, muscles, and bones. The higher the density, the darker the colour. CT is also Cheaper than MRI.
DEXA: . 3 facts
Dual Energy X-ray Absorptiometry (DEXA): Highly accurate. Radiation levels are similar to CT but lower (suntan). Segmented parts.
Anthropometry:
Skinfold: 3 facts
Anthropometry:
Skinfold measures the circumference at multiple sites to predict body fat percentage (%BF). Dependent on the measurer’s skill. Use equations to predict %BF.
Yuhasz Method:
Durnin Method:
Differences Between Methods: 2 facts
Yuhasz Method:
Uses 6 skinfolds (chest)(triceps, back, hip, abdomen, front thigh). Females (Rear thigh)
Durnin Method:
Uses 4 skinfolds (biceps, triceps, subscapular, supra-iliac).
Refer to specific tables for %BF conversion.
Differences Between Methods:
Percent fat varies depending on the equations used.
Ideal weight estimates are similar across methods.
BIA: 3 facts
Bioelectrical Impedance Analysis (BIA): Affected by hydration and equipment. It sends a mild shock through the body to see how well you conduct electricity. Very Inconsistent through different models.
Ultrasound: 3 facts
Ultrasound: Measures tissue differences. Sends sound waves through the body. Different tissues have different sounds. Used by athletes to check muscle development. Not researched as much.
