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Old 10-05-06 | 08:40 AM
  #60  
Pat
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Joined: Jan 2002
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From: Orlando, FL

Bikes: litespeed, cannondale

Originally Posted by Richard Cranium
Wrong, exercising at intensities that deplete glycogen develop all the components of energy metabolism, low intensity exercise does not.

While it is true that fat has to be converted to glucose before it is metabolized, the fact that acute shortages of energy stores are created during exercise is the basis for ALL weight loss, whether or not glycogen levels are being restored in a timely manner.

I give up you folks, you're too thick............this is simple stuff, engines that work out "learn to use gas very quickly" -- engines that idle along for a long time - do not..........

End of this joke.....
I believe you are in error on this one. Fat is not converted to glucose during oxidation. Fat runs through a different biochemical pathway called "beta oxidation". Glucose is oxidized in the KREBS cycle. Just do a search on Beta Oxidation and you can see what I mean.

This would seem to be a quibble but there are consequences. In an earlier post, I pointed out that the nervous system can not burn fat and has to burn carbohydrates. A number of posters have the idea that carbohydrate stores will eventually be replaced by fat. That just does not happen. You need to either eat carbohydrate or convert proteins (usually muscle) into carbohydrate to replenish carbohydrate stocks.

If you go out and deplete your carbohydrate (BONK), you have to eat enough calories of carbohydrate to replenish your glycogen stores or about 2000 calories (which is a pot load of carbohydrates believe me). Now, even nothing but intense riding with the right diet would probably work fine for weight loss. In a person doing this, virtually all of their carbohydrate consumption would go into replenishing glycogen stores or in fueling the nervous system. In couch potatos, these carbohydrates would probably be converted to fat. The exercising person would probably burn mainly fat during non exercise periods.

I think the trick to permanent weight loss is to find some blend of diet and exercise that works for you and that you can sustain over a life time. So the solutions would tend to be rather individual.

I was out in Santa Barbara hiking in the mountains near the coast. I ran into an "old" guy (even older than me). We chatted a bit. He hikes about 15+ miles per day in the mountains so that he can eat his favorite food ...... ice cream by the quart !!!! Well, I guess it works for him.

Pat
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