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This phenomenon is another reason why boosting dietary protein can be good, if you are fighting the battle of trying to lose fat and gain or at least not lose muscle.
You might also want to check out Phil Campbell's book "Ready set go - fitness for time crunched adults". Unfortunately, he doesn't write as succinctly as he could, but his bottom line is that interval training with short anaerobic bursts (e.g. sprinting or its equivalent in biking, eliptical or whatever) promotes fat loss and muscle gain by naturally boosting HGH (human growth hormone -- the elusive stuff that keeps young people slim and whose decline causes the middle aged spread). He recommends a fitness routine, that includes traditional cardio and weight training, but also the anaerobic interval stuff.
The hard part is that you can't just start sprinting -- you have to prepare yourself for it very carefully or you will be getting injuries left and right. You have to slowly build up your fast twich muscle and all that. I have been working on this on and off, and when I get it going it does seem to help alot with weight loss and my blood sugar thing.
He also says a serving of protein immediatly following the interval training, and a supplement of the amino acid L-glutamine enhances the growth hormone. He also talks about how sugars totally undermine all of this.
Sedonia
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