I have been reading a lot on the forum about drinking carbs on the bike. and have a few questions:
Is there any benefit from drinking fructose for rides under 1.5 hour, if it takes that long for consumed fructose to be available for energy? Perhaps it still helps with reducing RPE as our body detects that more carbs are on the way?
If we stick to the 60g of glucose can we use any mix of Maltodextrine / simple Glucose as long as there is enough water to absorb? So e.g. in a bottle of 750ml, we could add anything between only 60g of Maltodextrine, down to 30g Maltodextrine with 30g of simple Glucose and still have some space for a pinch of salt and citric acid for taste. Would it matter at all for performance? I guess one reason to go more towards Maltodextrine is if it is cold and we don’t expect to drink 750ml in an hour?
I don’t really get the Isotonic thing, on one way we are saying that the carbs only get absorbed once the concentration is similar to the concentration of dissolved particles in our body, but if that is the case then why is it dangerous to drink seawater as it increases the concentration of salt in our blood and extracts water from cells? If the salty water gets absorbed with high concentrations of salt, why doesn’t the water also get absorbed with high concentrations of carbs?