just the second runner ever to die in the Boston Marathon, and the first to die of hyponatraemia, which is caused by excess fluid consumption.I’ve spent several months talking to experts and reading everything I could find on the subject of human

and the absorption of fluid – leaving you feeling bloated. It is vital to ensure that you do not lose too much fluid. But taking on too much can cause water intoxication (hyponatraemia). In extreme cases this can lead to foaming at the mouth, nausea, vomiting

per kilogram of body weight per day. For example, a 72kg triathlete should consume 576g-720g of carbs per day. It’s also a good idea to consume a little more sodium and potassium in the three days before you race to prevent hyponatraemia (abnormally

consumption is also a potential danger and has started to become an issue as marathon running has broadened its appeal to attract more female and recreational runners. Hyponatraemia means "low blood sodium" and is caused by excessive water consumption, which

. If you over-hydrate, you dilute the sodium in your body, which can lead to hyponatraemia and, in extreme cases, death."Acclimatise yourselfIt's important to become used to racing conditions, even if it's a sprint race in a UK heat wave rather than

in my feet by mile 40, which had turned to pain by mile 50 and real agony by mile 60. I took a second 'big' ibuprofen, which might have been too much and might have given a risk of hyponatraemia, but the pain was hard to bear and the pill didn't have any

by drinking extra fluids. You know you’re adequately hydrated if your urine is clear or pale yellow in colour. Don’t restrict the salt in your diet. Low salt intake combined with excessive hydration can lead to hyponatraemia, a rare but dangerous condition

.Another key concern is that people will drink too much. Hyponatraemia is very serious and runners need to ensure they don't consume more fluids than they lose in sweat. Q. What should I eat during the taper weeks, especially the final couple of days before my

and was fine. – SleepyLionEverything in moderationModeration and specificity is the key. Drink too much when you're not used to it, and you risk hyponatraemia or at the very least having to stop to pee. Drink too little and you run the risk of dehydration

of your body weight during exercise through fluid loss may compromise performance. On the other hand, drinking too much may lead to the dangerous and potentially lethal condition of exercise-associated hyponatraemia (EAH).The Clinical Journal of Sports