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Message: <blockquote data-quote="LittleGreyCat" data-source="post: 1972301" data-attributes="member: 6467">Pulling together various threads and ideas, I wonder if the chocolate truffles would be a suitable fuel for an extended cycle ride?Lots of fat, a little bit of protein, not a lot of carbohydrate.However I know that it takes a while for glucose to get to the tissues if you are exercising hard (hence not being able to stave off the wall even if you are snarfing down glucose gels) so I don't know how quickly fats get through the gut and into the blood stream and available for use.Anyway, I will do a few minor experiments,I have no idea how to measure if I am running out of metabolic ketones in my muscles because there must be a maximum rate that body fat can be re-purposed for fuel.There must also be a point where gluconeogenesis can't keep up with the very limited demand for glucose during extreme exercise.I wonder if there is a study.......</blockquote>

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