So I read that it’s recommended to eat 10-12 grams of carbs per kilogram of weight for pre marathon fueling. I weigh 140 lbs so I should eat 800-1000 carbs in the days leading up to a marathon. How is it possible to eat this many carbs in a day? Suggestions on what to eat?
I think 10-12g is at the upper end of what you need for the 48 hours before and you don't need to 'eat' it all. I'd turn to drinking fruit juices, smoothies, yogurts, Gatorade, coconut water. They have a high sugar content and will make it much easier on the stomach to get in the carbs.
Three big meals plus three snacks (e.g. bagels/muffins including high sugar drinks) on the two days before the race is about all I've ever managed without feeling sick/bloated. Also wise to limit your intake of leafy greens, protein, fats and dairy so you have more space for carbs and reduce the likelihood of GI distress on raceday.
1kg of white rice, honey on top, there's your 800-1000g of carbs