Wed, Mar-08-06, 23:49
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Registered Member
Posts: 1,582
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Plan: antivegan,was subzerocarb
Stats: 200/187/175
BF:27%/19%/12%
Progress: 52%
Location: Flyover Zone
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Quote:
Originally Posted by theBear
Runners who are fully keto-adapted burn fat from the first step they take and do not 'shift gears'. I assume many here know about Greg Ellis' work on low carbs and exercise. He sent me many of the metabolic papers I have. He is about as dedicated to this path as I am, but is not nearly as strict. Keto-adaptation on zero carbs should be complete in 3-4 weeks.
The truth about exercise is that muscles NEVER use carbs as fuel, only fat, so the process of 'burning carbs is only the process of converting them into fat, which puts a severe load on the body during exercise- eliminate the carbs and endurance skyrockets. (At the risk of offending a few, I must say that Atkins -conventional- contention about burning carbs for fuel is false, like many of his ideas. The rats in the paper I mentioned were tested by having them swim. They were trained and conditioned for a long time during he study, of course. Those on a standard diet never were able to swim much longer than a few hours, but the ones on the true zero carb high fat diet were still swimming after eight hours and the experimenter had to end the session- no telling how long they might have gone on. Thus marathoners and long distance bike riders are severely limiting themselves by carb loading.
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So, Bear, are you saying that once someone is fully keto-adapted their muscle cells will use only fat for fuel, and leave the muscle glycogen stores alone? And, what if they are NOT keto-adapted?… in this case, will they use their muscle glycogen stores for fuel? OR… are you saying that muscle cells will NEVER use their glycogen stores, in any individual, regardless of whether they eat high carb or low carb… and that glycogen loading (carb loading) is simply a myth… because these glycogen stores in the muscle and the liver are ONLY for blood glucose level maintenance, and NEVER for muscle fuel (in any individual). Just want to make sure I understand what you are saying.
I don't dispute what you are saying, I just want to understand it. Because, you have to admit, this turns so much information that people have normally heard about exercise and diet completely upside down. I mean, I found so many references to the opposite out on the net, and nothing supporting what you say. Unless I am just not understanding what you are saying.
Quote:
Originally Posted by theBear
Gluconeogenesis cannot and will not even take place so long as there is enough fat intake, period.
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And... if one takes in no dietary carbs, and there is some minor use of glucose in the blood by the CNS, then how is this replaced? Of course, the better question is how are glycogen stores replaced, after they have contributed to keeping the blood glucose level at their normal fasting level? On a truly zero carb diet, where would the needed glucose come from, if not from gluconeogenesis? Not that gluconeogenesis is a bad thing. Life Without Bread points out that glucose can be produced in this fashion on an as-needed basis. When I first read this years ago, I thought "yes... and keep insulin levels low in the process!". But, your statement of gluconeogenesis never taking place puzzles me.
Last edited by PaleoDeano : Thu, Mar-09-06 at 00:57.
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