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Unit 11: Sports Nutrition BTEC Level 3

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on 19 June 2015

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Transcript of Unit 11: Sports Nutrition BTEC Level 3

BTEC Sport Level 3
Unit 11:Sports Nutrition
Task 2

- P3 - describe energy intake and expenditure in sports performance
- M1 - explain energy intake and expenditure in sports performance
- P4 - describe energy balance and its importance in relation to sports performance
- M2 - explain the importance of energy balance in relation to sports performance
- D1 - analyse the effects of energy balance on sports performance
Sources
The potential fuel sources that are available to exercising muscles.
Methods of assessing percentage body fat
These include:
Measuring Body Composition
The most commonly used method of classification of body type is known as somatotyping, which recognises 3 body types:
Energy
Energy is obtained from the foods you eat and used to support your basal metabolic rate (the minimum amount of energy required to sustain your body's vital functions in a waking state) and all activity carried out at work and leisure.
Skinfold analysis
Bioelectrical Impedance Analysis
Calorie
(cal)
The energy required to raise 1g of water by 1°C

= 4.2 Joules (J)
Kilojoule
(kJ)
Kilocalorie
(kCal)
The energy required to raise the temperature of 1kg of water by 1°C. Used to convey the energy value of food.

= 1000 calories
Joule
(J)
1 Joule of energy moves a mass of 1g at a velocity of 1 m/sec.

4.2 J = 1 cal

1000 Joules = 1 kilojoule (kJ)
A unit of measurement for energy but like the calorie the joule is not a large unit of energy; therefore kilojoules are more often used.

= 1000 joules = 1 kJ
Fats
1 gram of fat
= 9.0 kcal or 38kJ
Carbohydrates
1 gram of carbohydrate
= 4.0kcal or 17kJ


Fats are the main energy fuels for your exercising muscles. Exercising muscles prefer glucose as a fuel, especially as the exercise intensity increases.
Like fats, carbohydrates are the main energy fuels for your exercising muscles.
Protein
1 gram protein
= 4.0 kcal or 17 kJ
Protein may be used during prolonged periods of exercise and towards the latter stages of endurance events like the marathon. Particularly if fat and carbohydrate as a source of fuel have become limited.
Body Composition
Endomorph
A heavy build, rounded shape, a tendency to gain weight, and generally finds weight loss difficult.
Mesomorph
A muscular build and large bone structure.
Most of us have characteristics of each type to a varying degree, and although many women in particular want to be slim and ectomorph like, it is important to note that it is impossible to alter your basic body type.
The most commonly used method of classification of body type is known as somatotyping, which recognises 3 body types:
Ectomorph
A slim build, long limbs, delicate bone structure, a low body fat and muscle content and usually finds weight gain difficult.
Lean Body Mass
Body composition refers to the lean body mass and body fat that make up total body weight. Lean bodymass includes bone, muscle, water, connective and organ tissue. Body fat includes both essential and non essential fat stores.
Percentage of body fat
People actively engaged in fitness regimes are often concerned about their weight, whether for performance or health reasons. Unlike body type, it is possible to alter body composition, with exercise generally having the effect of increasing lean body mass and decreasing body fat.
Hydrodensitomtery
Body Weight
More precisely referred to as body mass - is usually measure in kilograms.
Some individuals have problems controlling their body weight, often resulting in obesity
some sports are categorised based on body weight.

Calorimetry
- how energy expenditure is assessed.
- essentially through the measurement of heat production
Direct Calorimetry
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