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Hmmm. Fat burning, and bulking, require different strategies, and while it may be possible to do both at the same time, especially for a raw beginner, it's usually to approach them separately, as while you MAY be able to do it, yiou won't get optimal results from either. As far as supplements go, I dwouldn't even bother. A cup of coffee (caffeine) before a workout supposedly thins the blood a bit and some theorize that it makes fat somewhat more available for burning. I'm not sure that that's corret, but it does get me up for a workout.
I've never heard of caffeine thinning the blood, but it does stimulate glycogen catabolism and some of its metabolites even stimulate lypolysis (fat breakdown and release into the blood). Caffeine is usually the only effective ingredient in all of those diet pills, so save yourself the money and just drink some coffee. But be careful, since caffeine is a diuretic and you don't want to be chronically dehydrated.
Caffeine is OK before exercise for young people, or conditioned older exercisers without the risk factors of heart disease. But those who don't fall in these two categories might want to think twice about that cup of joe before working out:
I've found the less in my stomach before a workout, the better. I try to avoid eating or drinking anything for at least an hour before a workout. But that's just meIn healthy volunteers, the equivalent of two cups of coffee reduced the body's ability to boost blood flow to the heart muscle in response to exercise, and the effect was stronger when the participants were in a chamber simulating high altitude, according to a new study in the Jan. 17, 2006, issue of the Journal of the American College of Cardiology.
Blood flow normally increases in response to exercise, and the results indicate that caffeine reduces the body's ability to boost blood flow to the muscle of the heart on demand. The ratio of exercise blood flow to resting blood flow, called the myocardial flow reserve, was 22 percent lower in the group at normal air pressure after ingesting caffeine and 39 percent lower in the group in the high-altitude chamber. Dr. Kaufmann said that caffeine may block certain receptors in the walls of blood vessels, interfering with the normal process by which adenosine signals blood vessels to dilate in response to the demands of physical activity.
"Although these findings seem not to have a clinical importance in healthy volunteers, they may raise safety questions in patients with reduced coronary flow reserve, as seen in coronary artery disease, particularly before physical exercise and at high-altitude exposure," the researchers wrote.