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Flashcards in Body Composition / BMI Deck (11)
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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%


State some of the health implications of being obese

Cornory Heart Disease (CHD)
Type 2 diabeties
Increased risk of cancer
Increased Blood Pressure
Overload of joints (less stability)
Psychological harm (embarssement)
Restricts performance