In the days before your marathon your training should taper but carbohydrate intake should increase as part of a carbohydrate loading schedule this involves taking in 8 12g of carbohydrate per kilo of bodyweight per 24 hours for 2 days on the day make sure you have breakfast 3 4 hours before and include normal breakfast foods that you have had before a training run this should be mainly carbohydrate based when preparing for a marathon it is important to remember to plan in train as you r