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Sport nutrition advice

Nutrition and Hydration - the facts

Have you considered your nutrition and hydration strategy? Given the importance of sports nutrition to your training, it's essential that you plan and organise your nutritional strategy as this is fundamental and key to your success.  No matter how hard you train, if the wrong fuel is entering your body you're not going to train and compete optimally.

 

Nutrition – you only get out what you put in

Nutrition plan pie chart. Average diet - 40% fat, 20% protein, 40% carbohydrates. Healthy diet for sport - 25% fat, 15% protein, 60% carbohydrates. Healthy diet - 30% fat, 20% protein, 50% carbohydrates.

Having a diet that's high in carbohydrate is essential as a means of providing your muscles with the energy needed to run and recover quickly afterwards. The body’s preferred source of energy is carbohydrates and this is stored in your muscles and liver as a fuel called ‘glycogen’. The body’s glycogen stores are limited so you need to eat plenty of carbohydrates to keep these stores topped up. Good sources of carbohydrates are pasta, rice, bread, cereals and potatoes.

A good balanced diet with plenty of variety, fruit and vegetables will provide the essential minerals and vitamins needed to maintain health and vitality.

Key facts

  • Carbohydrates are the body’s primary source of fuel for performance.
  • Carbohydrates are stored in the body as glycogen but only in limited quantities enough for just 1½ to 2 hours running.
  • Fatigue occurs when glycogen stores are depleted resulting in a significant reduction in running speed.
  • Taking on carbohydrates before and during prolonged performance has been shown to reduce the negative impact of glycogen depletion on performance.*

 

Hydration – give your body the fuel it needs

Hydration is also key to performance. A proper hydration plan before, during and after running is required to maintain fluid levels. Studies have shown people are often dehydrated before they start exercise while proper rehydration after a run enhances the recovery process.

You can check your hydration status throughout the day by checking the colour of your urine:

Image showing hydration levels based on the colour of your urine.

Stay well hydrated by drinking a minimum of 2 litres of fluid per day.  An excellent way to ensure a high fluid intake is to carry a water bottle around with you at home or work to promote regular drinking.

Remember you'll need to drink more in hot and humid conditions, and also in air conditioned environments.

Key facts

  • A 2% reduction in body weight through sweat can significantly decrease performance.
  • Marathon runners have been reported to lose up to 8% of their body weight in warm conditions.
  • Fluid lost through sweat contains key electrolytes such as sodium and potassium which must be replaced.
  • Sports drinks such as Lucozade Sport Body Fuel have been shown to reduce the negative impact of dehydration on prolonged performance.

* Sport Sciences 2004; 22

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