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I have been running since April of this year and am now starting to embark upon relatively long runs. I ran 10 miles last week with only lucozade isotonic and felt really good.
Today I ran 12 miles and have read advice saying that more carbs need to be taken on board in long runs such as these. I took a High 5 carb pack before the run and one an hour in (which was about 6 miles). I also drank lucozade on the run. However, I definitely felt from about mile 8 that I needed the loo which I hadn't experienced before and am sure it was the combination of the High 5s and the lucozade.
My question is if I drink lucozade throughout a very long run (I am doing London marathon next year) will that be enough? I know it has some carb content but wouldn't have thought it was enough. So if the carb gels upset my stomach what could I take instead?
OR I could take the High 5s but drink water instead of lucozade but I am worried about replenishing the salts and potassium etc if I do that.
I hope this makes sense, can anyone help please?! I really don't want to head out on long runs and be worrying about needing the toilet!