Sorry about the long title, was about as concise as I could make it. I thought about putting this in GQ as I’m looking more for facts than opinions, but as it leans towards medical advice it had better go here.
The background is that I have always struggled with eating/drinking before/during exercise. I remember as a child always having dinner after football practice, for example. As an adult, I’ll happily go for a run at lunchtime of 5 miles plus on no breakfast or lunch (just water), but as I have increased the distance of my runs in training for my first marathon next month, obviously I’ve been trying to fuel up a bit more.
My longest runs so far have been 14 miles (during which I managed to force down 2 sports jelly beans with about half a bottle of water), 18 miles (1 sports jelly bean with water, felt awful for the last few miles), and 22 miles (had breakfast of a bowl of Cheerios with milk, and a banana 2 hours beforehand, plus water, just one sip of water during the run and still didn’t feel good).
I think my problem is reflux - I know the digestive system essentially shuts down during a long run, and it seems mine doesn’t even want to swallow. So on the evidence so far, I’m minded to have a similar breakfast before my marathon, but not bother taking on any liquid or food during the race, unless I feel thirsty (I haven’t felt thirst during any of my runs to date). The weather is likely to be cool on the day (certainly under 15 degrees Celsius) and possibly wet.
A little light Googling suggests this is not necessarily crazy - found a couple of sources saying 14 people have died from over-drinking, but none from dehydration, and the current sports science favours drinking when thirsty rather than keeping to a set schedule. I just wondered if any of you Dopers can add further insight. Thanks in advance.