Body Composition
- Created by: skye_tanner
- Created on: 15-06-16 12:43
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- Body Composition
- definition
- the chemical make-up of the human body
- fat mass = percentage of body weight that is stored as fat
- lean body mass = the weight of the rest of the body
- the chemical make-up of the human body
- BC assessment
- hydrostatic weighing
- weighed whilst immersed in a water tank
- fat is less dense and floats in water - most accurate measure of body fat
- bioelectrical impedance
- sends low, safe electrical current through the body
- current passes freely through the fluid contained in the muscles tissue, but encounters resistance when making contact with fat
- when set against a person's height and weight the scales calculate percentage of body fat
- not practical, affected by hydration, not reliable on athletes who have more lean muscle
- skinfold callipers
- most widely used because they are accessible, cheap and practical
- testers must be trained, the same site cant be measured several times
- measures subcutaneous fat below the skin and then sums the skinfolds at the end, common areas are the; triceps, biceps, subscapular and suprailiac
- BMI
- a measure of an adult weight in relation to their height = weight divided by height 2
- not suitable for pretty much anyone, doesn't take muscle into account
- hydrostatic weighing
- Overweight / Obesity
- occurs as a result of an imbalance between energy intake and energy expenditure
- if energy intake exceeds energy expenditure then energy is stored as fat
- over weight = body weight exceeding the normal standard weight
- obesity = having a very high amount of body fat
- health implications
- fat = essential fuel for endurance athletes & insulates vital organs
- obesity causes; diabetes, cancers, long term stress on the CV system, CHD, angina, high blood pressure
- overload of joints which impacts on alignment and posture
- obese individuals participating in weight bearing activities will have an increased energy expenditure cost
- Metabolic Rates
- basal metabolic rate
- the lowest rate of energy expenditure needed to sustain the body's essential physiological functions while at rest
- resting metabolic rate
- the amount of calories you need to consume to sustain your body's energy requirements at rest
- metabolic equivalent task
- shows energy expenditure for a physical activity
- the ratio of a performers working metabolic rate relative to their resting metabolic rate
- basal metabolic rate
- effects pf physical activity on BC
- increase in the number of calories burnt during exercise which increases metabolic rate after exercise
- increase lean body mass
- definition
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