Eating For A Triathlon Or Marathon 

Don’t try to change your diet right before your first triathlon or marathon.  If you carb-load right before your race this could make your stomach feel heavy and make you feel sick.  If you have been doing this type of computations a lot you might want to think about carb-loading.  Most people wont need to do this because they have enough reserves that you wont need to do it.  Remember if its not broken don’t fix it.