juice two hours before the race, then 125-250ml just before.Pre-Race MealsAccompany any of the following with one to two cups (150-300ml) of water or diluted fruit juice (1 part juice, 1 or 2 parts water): Porridge with raisins and honey Cereal with milk

Tuna and butter bean salad Arrange 2 handfuls watercress (or other salad leaves) and some chopped peppers on a plate. Spoon 100g tinned tuna on top, breaking it up as you go. Scatter over 100g (approx of a 410g can) butter beans. Pour over 1

of your urine. University of Connecticut researchers found that urine colour correlated very accurately with hydration status. Pale yellow urine indicates you're within one per cent of optimal hydration. Try to drink one litre of water for every 1,000kcal

. Another energy bar for runners who want something that tastes like a sweet.Contact Boots stores nationwideHigh Five Energy Bar – £1.10Weight 65g; Calories 211; Carbs 48.7g; Protein 2g; Fat 0.9g; Fibre 3.1g.Main Ingredients Mixed dried fruits, oats