HMMM....I think I see what you're thinking is on this. Let me suggest another way of looking at it cuz I don't think 2 hours a day 5 days a week is going to make your body want to preserve you biceps especially at such a low calorie intake for such a big guy.

One thing you're talking about is cortisol. I've seen at least one study that suggests that higher intensity to some extent releases more cortisol than long duration. But that was 20 minutes vs. 45 minutes. Not 2 hours! It becomes a moot point. I agree with Dave on that issue.

But fat loss is not a adaptation. It's the last thing your body wants to do. To adapt to long duration (and longer and longer duration) your body adapts by becoming more efficient at it. This means in a nutshell that over time your body burns less fat to produce the same amount of work. Not really a desirable outcome unless your prepared to go longer and longer periods of time.

Muscle is the only tissue in the body to burn fat. More muscle burns more fat. A larger muscle would burn more fat during any activity than a smaller one. The more efficient your body becomes at utilizing fat the less muscle it will need to do so. There is nothing muscle preserving in long duration cardio. It just doesn't work that way. Preserving muscle is more about nutrition (like the post workout meal Dave mentioned) and resistance exercise. Your body will not look at the fat on your frame and say, "ok, I have to use all this up before I can touch the muscle."

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If you act sanctimonious I will just list out your logical fallacies until you get pissed off and spew blasphemous remarks.