From Peak Performance
Although fat adaptation increases fat oxidation, thereby conserving stores of carbohydrate, it also seems to reduce the activity of enzymes needed for the release of energy from carbohydrate such as PDH. In other words, yes you’re conserving muscle glycogen, but you’re also preventing your body from utilising that glycogen as efficiently as you would normally. And given that the critical importance of carbohydrate is its ability to rapidly generate large amounts of ATP for muscular contraction with or without oxygen, any theoretical benefits from fat adaptation are soon lost!
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I would say the article is missing a lot of information, mainly because the references are somewhat outdated.
ReplyDeleteMuch has been written about 'train low-compete high' in the last few years and that information should have been included for a more comprehensive review...