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Hi, i'm wondering if anyone has any ideas about what might cause my sickness (nausea and vomiting) after marathons. I'm not talking immediately afterwards; immediately afterwards i'm hungry and have a good meal, pasta or whatever, but slowly but surely after each marathon i start to feel queasy as the day goes on and by the evening i'm nauseous, eventually vomiting - and then this goes on for days afterwards, i cannot generally eat anything until day 4 or 5 after a marathon. I'm a 4 hour-ish marathon runner (determined to get under ) and drink to thirst trying to make sure i dont drink too much and cause hypernatremia or drink too little and get dehydrated. I'm a really salty sweater (and am always covered in a white crusty layer at the end of a long run (nice!) but take electroyte tablets to try and combat that. I do take gels but only the same ones as i've taken in training and never take anything offered on race day if i havent used it in training.
I'm at a loss as to where to go next with this, I dont get this in my longest run pre-marathon (21 miles), anyone got any ideas? thanks, Jo