Harie said:
powersam said:
muscle you are using will not be burnt for energy before fat
That's untrue. Your body will suck the calories from wherever it needs to survive. Since fat is a mechanism that protects us against starvation, your body is less apt to release fat stores.
If what you said were true, you'd never lose muscle mass or strength while you were cutting.
you are both wrong. Muscle is not broken down by cortisol as fast as fat is, but it still is. And at higher cortisol levels, the two start to merge. For most guys doing fasting cardio or dieting, 10-30% of the mass lost is muscle, and the rest fat. If you do high intensity cardio before breakfast, the coritisol levels will get high enough to maybe approach 50-50.
I think the branch chain amino acids can be metabolised in the muscle. The rest have to go to the liver to be de-aminated first. The more testosterone you have at the time though, and the more sensitive your muscles are to the testosterone from previous workouts, and the more HGH you have, the more those amino acids will get put back on the muscle before getting taken out of the muscle cell. Cortisol breaks the protein, then the other stuff puts it back. That is why steroids are good for cutting.
As long as you keep your workouts under 1 hour, your testosterone levels should be good. But if you want your fasting cardio to go over an hour, like say 2 hours like I do, then I'd use a good anabolic steroid. Most of them are crap though. Sides outweigh the benifits. Exercise that is outside your ideal time/intensity range will lower your testosterone.
Muscle grouth is about stimulating hormone response, making your muscles sensitive to those hormones, and giving them fuel at the right time, but not so much that you put on more fat than muscle. My sister's boyfriend thinks his 4 hours high intensity workouts are the way to go, and he does not gain mass. He gained 15 pounds in 5 years, and seems to think his creatine water weight was fast muscle grouth. More is not better, though you do have to really push yourself during those 45 minutes.