Nutrients and a Healthy Diet Dietary Intake

... Gary Boswell 1C Nutrients and a Healthy Diet Dietary Intake The body requires energy for every physical activity. The amount depends on the duration and type of activity. Energy is measured in kcal and is obtained from the body stores or the food we eat. Glycogen is the main source of fuel used by the muscles to enable you to undertake both aerobic and anaerobic exercise. If you train with low glycogen stores you will feel constantly tired, training performance will be lower and you will be more prone to injury and illness. A calorie (cal) is the amount of heat energy required to raise the temperature of 1g of water 1°C from 14° to 15°C. A kilocalorie (kcal) is the amount of heat required to raise the temperature of 1000g of water 1°C. Nutrient Balance Carefully planned nutrition must provide an energy balance and a nutrient balance. The nutrients are: * Proteins

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