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Learning aim C Understand programme-related nutritional needs

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1 Learning aim C Understand programme-related nutritional needs
Unit 2: Fitness Training and Programming for Health, Sport and Well-being Learning aim C Understand programme-related nutritional needs

2 Key terms to research Factsheet Dietary reference values (DRV’s)
Reference Nutrient Intake (RNI) Estimated Average Requirements (EAR) Lower Reference Nutrient Intake (LRNI) Safe Intake (SI) Basal metabolic rate (BMR)

3 Common terminology Video Dietary Reference values (DRV’s)
Reference Nutrient Intake (RNI) Estimated amount of a nutrient needed for 97% of a group Estimated Average Requirement (EAR) Energy intake needed to meet average nutrient needs of a group Lower Reference Nutrient Intake (LRNI) Estimated amount of a nutrient for a small percentage of a group Safe Intake (SI) Estimated amount of nutrient for which there is no RNI, EAR or LRNI © Pearson Education Ltd Copying permitted for purchasing institution only.

4 Dietary reference values
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5 Website © Pearson Education Ltd Copying permitted for purchasing institution only.

6 Energy Balance Draw a diagram showing what you understand about Energy Balance © Pearson Education Ltd Copying permitted for purchasing institution only.

7 Negative energy balance
A negative energy balance does lead to weight loss. The body detects an energy “deficit” and fat reserves are called upon to make up the difference. A severe negative energy balance can lead to a decline in metabolism, decreases in bone mass, reductions in thyroid hormones, reductions in testosterone levels, an inability to concentrate, and a reduction in physical performance. © Pearson Education Ltd Copying permitted for purchasing institution only.

8 Positive energy balance
With too much overfeeding, plaques can build up in arteries, the blood pressure and cholesterol in our body can increase, become insulin resistant and suffer from diabetes, increase our risk for certain cancers, and so on.

9 Calculate your calorie intake for yesterday…
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10 Definitions to research
Basal Metabolic Rate (BMR) Resting Metabolic Rate (RMR) Dietary Thermogenesis (DT) Physical Activity (PA) Adaptive Thermogenesis (AT) © Pearson Education Ltd Copying permitted for purchasing institution only.

11 Common terminology Basal Metabolic Rate (BMR)
The lowest rate of energy use that can sustain life Resting Metabolic Rate (RMR) Metabolic rate of person at rest – accounts for 60–70% of total energy output Dietary Thermogenesis (DT) Energy expended above RMR for digestion, absorption and storage of food © Pearson Education Ltd Copying permitted for purchasing institution only.

12 Common terminology Physical Activity (PA) Adaptive Thermogenesis (AT)
Energy expended above RMR and DT due to physical activity Adaptive Thermogenesis (AT) Energy expended due to environmental or physiological stresses (e.g. shivering or fidgeting) © Pearson Education Ltd Copying permitted for purchasing institution only.

13 BMR Your BMR (Basal Metabolic Rate) is an estimate of how many calories you would burn if you were to do nothing but rest for 24 hours. It represents the minimum amount of energy needed to keep your body functioning, including breathing and keeping your heart beating. Your BMR does not include the calories you burn from normal daily activities or exercise. © Pearson Education Ltd Copying permitted for purchasing institution only.

14 Basal metabolic rate (BMR)
To estimate energy requirements, calculate BMR in kilocalories per day. It is affected by: Age Gender Climate Physical activity Age (years) Basal metabolic rates in kcal per day (W = weight in kg) Males 10-17 BMR = 17.7W + 657 18-29 BMR = 15.1W + 692 30-59 BMR = 11.5W + 873 60-74 BMR = 11.9W + 700 Females BMR = 13.4W + 691 BMR = 14.8W + 487 BMR = 8.3W + 846 BMR = 9.2W + 687 © Pearson Education Ltd Copying permitted for purchasing institution only.

15 Task Calculate your own energy requirements. Don’t forget to consider your: gender age weight activity levels. Calculate your BMR and PAL in Tables 2.9 and 2.10. You will also need your results from Worksheet 2.6: Health monitoring tests. © Pearson Education Ltd Copying permitted for purchasing institution only.

16 Harris Benedict Formula
Once you've calculated your BMR, this is then put into the Harris Benedict Formula, which calculates your total calorie intake required to maintain your current weight. This is as follows: Little/no exercise: BMR * 1.2 = Total Calorie Need Light exercise: BMR * = Total Calorie Need Moderate exercise (3-5 days/wk): BMR * 1.55 = Total Calorie Need Very active (6-7 days/wk): BMR * = Total Calorie Need Extra active (very active & physical job): BMR * 1.9 = Total Calorie Need © Pearson Education Ltd Copying permitted for purchasing institution only.

17 Components of a balanced diet
In groups of 3 Group 1 - Carbohydrates, Fats and Protein Group 2 - Vitamins, Minerals Calcium and Iron Group 3 - Hydration, fluid intake, dehydration & hyper hydration Using the textbook research your own nutrient, produce notes for a group handout and then feedback to the class Use the key terms that are used in the book. Pages 87-93 © Pearson Education Ltd Copying permitted for purchasing institution only.

18 Macronutrients Carbohydrates Proteins Fats
Most readily available source of energy Simple or complex Stored as glycogen in the body Carbohydrates = 45–70% of calories consumed Proteins Smallest units = amino acids (building blocks of protein) Build and repair body tissues Secondary source of energy after carbohydrates and fats Fats Most concentrated source of energy Provide body with insulation, cushioning and buoyancy Stored in adipose tissue Fat = 20–30g per day © Pearson Education Ltd Copying permitted for purchasing institution only.

19 Micronutrients Minerals Calcium Iron Non-calorific essential for life
Macrominerals required in large amounts (several hundred mgs per day) Trace elements, e.g. copper and selenium required in smaller amounts (micrograms per day) Calcium Essential for development of healthy bones and teeth Required for blood clotting, muscle and nerve activity and cell permeability Reference intake 700 mg per day for adults Iron Component of haemoglobin. Lack of iron leads to anaemia, decreasing oxygen transport leading to fatigue Reference intake 8.7 mg for men and 14.8 mg for women © Pearson Education Ltd Copying permitted for purchasing institution only.

20 Micronutrients: Vitamins
Vitamins A, B, C & D Vital non-calorific nutrients required in small amounts A – helps eyes functions and respiration. Found in green vegetables and carrots) B – essential to release energy from foods. Found in lean meats, eggs, cereals, wholegrains and milk C – essential for formation and healthy functioning of collagen (major component of skin, bone and connective tissue) and a stimulant for the body’s defences. Found in vegetables and citrus fruits. D – helps with absorption of calcium and phosphorus to aid bone health. Found in oily fish, eggs, margarine or produced in skin by ultraviolet light. © Pearson Education Ltd Copying permitted for purchasing institution only.

21 Daily water balance for an adult male
Hydration Water makes up 50–60% of the body Main transport system for the body Dehydration can reduce strength, power and aerobic capacity Hyperhydration is an elevated bodily water content that can be dangerous to health Hyponatremia is a state of low sodium levels in the body fluids and can be fatal Daily water input Daily water output Source Millilitres Fluids 1200 Skin 850 Food 1000 Urine and faeces 1350 Metabolism 350 Lungs Total 2550 Daily water balance for an adult male © Pearson Education Ltd Copying permitted for purchasing institution only.

22 Nutritional strategies
Adapting diet to gain/lose weight For gains in lean body mass, progressive strength programmes can be supported by high protein, low fat diet Different sports require different optimal body weight Weight loss often means fat loss Using ergogenic aids Energy gels/bars – designed to replenish carbohydrate Protein drinks – only take 30 minutes to reach muscle area after ingestion Carbohydrate loading – used by endurance athletes to maximise glycogen storage. Maximising carbohydrate intake 2-3 days before event will aid this storage. © Pearson Education Ltd Copying permitted for purchasing institution only.


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