Describe and explain energy intake and expenditure in sports performance P3, M1

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Describe and explain energy intake and expenditure in sports performance P3, M1

Energy intake and expenditure in swimming

Swimmers get there energy from food they eat. Food can be measured in calories, joules, kilocalories and kilojoules. Calories measure energy, especially heat energy. One calorie is the energy required to raise the temperature of one gram of water by one degree Celsius and a kilocalorie is equal to 1,000 calories. A joule is most commonly used to measure energy, one joule moves a mass of 1g at 1 metre per second and a kilojoule is equal to 1,000 joules.

Swimmers get most of the energy for their workout and performance from carbohydrates. There are two types of carbohydrates, simple and complex. A complex carbohydrate consists of large molecules of simple carbohydrates, so they must be broken down into simple carbohydrates. Swimmers will tend to consume 55-70% of carbs in their diet. Fat is the secondary energy source but it takes 20-30 minutes before the swimmer uses the energy. Fats are the slowest source of energy but the most energy efficient. Each gram of fat supplies the body with about 9 calories; this is more than proteins and