I note the informed discussion on drinks on this forum at http://www.coolrunni...showtopic=35414
If i got it right .. Main Points:
- Overhyrdation is main culprit of hyponatremia in running.. which is potentially fatal if experienced and not treated properly
- Claims zero science to sports drinks such as Gatorade
- Glucose does not increase absorbtion of water
- Claims there's a well orchestrated conspiracy behind this industry (gatorade funds key and peak bodies including in the US and AUS and has impacted on medical literature)
- Its a myth that carbohydrate=electrolyte drinks is better for rehydration than water.
- He traced the history of the introduction of sports drinks and the science around it. Very interesting and well documented in the book
- Its okay to lose body weight through dehydration - top runners lose up to 10% bodyweight.
- Importantly only drink when you are thirsty - no more. Sportsdrinks have promoted quantity/hour ... its a load of bollocks.
- Colour of urine not great indicator of hydration
- Body is great self regulator of blood sodium and you do not need to support intake of salts almost impossible to have a deficiency. Problem is caused by overhydration and dilution of Na+
Great and informative talk and covered the history of sports drinks.
funnily enough Ross Tucker got tweeted during the talk by an olympian who is sponsored by gatorade and cast aspersions at some of Ross's tweets.
TN has been working on this topic for over 30 years and blames overhydration and the myths promoted by sports drinks for at least 12 deaths in sport but certain there's a whole lot more.
For those of you who like me had never heard of hypnatremia
In the vast majority of cases, hyponatremia occurs as a result of excess body water diluting the serum sodium.
Hyponatremia is most often a complication of other medical illnesses in which excess water accumulates in the body at a higher rate than can be excreted (for example in congestive heart failure, syndrome of inappropriate antidiuretic hormone, SIADH, or polydipsia). Sometimes it may be a result of overhydration.
Lack of sodium is virtually never the cause of hyponatremia, although it can promote hyponatremia indirectly. In particular, sodium loss can lead to a state of volume depletion, with volume depletion serving as signal for the release of ADH (anti-diuretic hormone). As a result of ADH-stimulated water retention, blood sodium becomes diluted and hyponatremia results.
Exercise-associated hyponatremia (EAH), however, is not uncommon. Researchers found, for instance, that 13% of the athletes who finished the 2002 Boston Marathon were in a clinically hyponatremic condition.
Edited by nofootprints, 26 July 2012 - 06:22 AM.