Flashcards in Body Composition / BMI Deck (11)
Body Composition is a combination of fat mass and lean body mass. Define these two terms
Fat mass : The percentage of body weight that is stored as fat
Lean body mass : The weight of the rest of the body (eg, bones/organs/connective tissues
Explain how Hydrostatic weighing can be used to calculate a persons fat mass percentage
Weigh out of the water
Weighed while totally immersed in water
The difference is the fat mass percentage (as fat is less dense and floats)
Trapped air in lungs / water density may need to be taken into account
Explain how Bioelectrical impendance can be used to calculate a persons body fat percentage
An electrical current is passed through the body
The current passes through muscle tissue fluid easily, but cannot pass through fat tissue easily
The persons height + weight is then used, so that the body fat scales used can calculate their body fat percentage
Explain how Skin Fold Calipers work
They are used to measure (in mm) the amount of subcutaneous fat on one side of the body
Done on the tricep / bicep / subscapula / suprailiac
Sum of these sites are then used to calculate the percentage of body fat
What is the formula used to calculate BMI (body mass index)?
Weight / (height)^2
What does BMI do? And what are the values for the different catagories of weight?
A measure of an adults weight in relation to their height
What is RMR and BMR, and when are they taken?
RMR (resting metabolic rate) - At rest
BMR (Basal metabolic rate) - Directly after 8hr sleep
What does RMR represent?
The amount of calories you need to consume to sustain your bodies energy requirments at rest
What is a MET?
Metabolic equivalent task
Is a way of of expressing energy cost (1 met = resting VO2)
What is the % of Proteins / fats / carbohydrates that you need in your diet?
Proteins = 30%
Fats = 15%
Carbohydrates = 55%