Here’s my Half Carb Loading Plan from my Sports Dietician:
Day Before
You are aiming for ~700 grams of carbohydrate for the day. The day might look like:
Breakfast
4 Weet-Bix with milk (2 cups)
2 slices of toast with jam/honey
3 tablespoons Sustagen Sport with 250ml milk
Morning and Afternoon Tea
3 tablespoons Sustagen Sport with 250ml milk
2 cinnamon bun or 4 slices fruit bread
1 fruit bar
Lunch
2 ½ cups cooked rice or pasta with 150g meat/chicken or fish and vegetables or salad
Dinner
150g meat, chicken or fish
2 ½ cups cooked pasta or rice
Veggies/salad
Supper
6 tablespoons Sustagen Sport with 250 ml milk
2000ml sports drink throughout the day plus 2000ml water
Race-Day
Breakfast (2 hours prior)
4 Weet-Bix with milk
2 slices of toast with jam/honey
Or 2 serves of Sustagen Sport and
1 x Yakult
Plenty of water and/or sports drink (1 litre) in the couple of hours leading up to the race.
During the Run
You will still be aiming for a minimum of 750ml of fluid per hour. Make sure that 750 ml of this is sports drink and the remainder can be water or coke.
You will pass through an aid station every 2 km. This is ~5 every hour.
The fluid will be in plastic cups of approximately 250ml in volume (but likely to be only half-filled). If stopping at every aid station you will need to consume approx. 150ml (big gulp) of sports drink plus two big gulps of water with every additional carbohydrate.
In addition you will need one gel with water after the first hour. If you feel like coke, substitute one of your carbohydrate options not the sports drink.
A rough guide for the run is 1-2 gels plus fluids.