Avoid Hyponatremia

According to The New England Journal of Medicine, 13% of 488 Boston Marathon finishers studied had hyponatremia, which is a dangerous (and even fatal in severe cases) condition that is caused by an abnormally low level of sodium in the blood.

The strongest single predictor of hyponatremia is substantial weight gain during the race, which correlates with excessive fluid intake. Runners should drink only as much fluid as they lose with sweating. You can test your body’s sweat rate, but thirst is usually a good guide. Replacing lost electrolytes—for example, salt—should also be part of your fueling plan.

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Written by Jenny Nickelson

Jenny Nickelson has been a sports enthusiast since childhood. Because of her deep love to water, she started training swimming in early years. Today she swears on variety and does it all: from swimming, running and cycling to fitness, skiing, dancing and mountaineering.

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Stay Fit on Vacation

Stay Fit on Vacation

Porridge with peanuts and maple syrup