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I was reading a column and found a few paragraphs I wonder about and I'd like to hear what some of you think about it:
excerpt
from:
http://www.bodybuilding.com/fun/likness10.htm
First, your body has something called energy systems that are used to fuel activity. Contrary to what some people may believe, your body draws on all of these systems, all of the time. The activity you perform, however, dictates which system is the one mainly being used (not exclusively). Just as your body always gets some of its energy requirements from protein, your body is always using a little bit of each system.
Two systems are anaerobic, which means they do not use oxygen. The ATP-CP system is used for short, intense bouts of work. Without getting too technical, a molecule in your muscle cell is split to generate energy, and creatine phosphate is used to rebuild that molecule so more energy can be produced. This system is especially important for high intensity activity such as weight training, but it only lasts for around ten seconds. Creatine supplementation can increase the capacity of this system.
The second anaerobic system is known as the lactic acid system or anaerobic glycolysis. This system is the predominant system for moderately intense activity that lasts around 2 minutes. This system uses glucose (a form of sugar) present in your blood, or glycogen stored in your muscle cell, for fuel. Post workout nutrition, such as shakes, may help recharge this energy system and keep you primed for the next workout.
The final system, and the one that takes center stage with aerobic activity, is the oxidative system because, yes, it uses oxygen. This system can use protein, carbohydrate, or fat for fuel, but relies mainly on carbohydrates. What is interesting about this system is that, depending on your heart rate; it will use more or less carbohydrate, protein, or fat. The lower your heart rate, in general, the more it will use fat for fuel rather than carbohydrate or protein. This is where science stops and pure speculation can ruin the whole affair. First, people get excited when they realize that the lower heart rate burns more fat. If you think about it, sitting at your desk or sleeping makes you a fat burning machine! While this is, to a certain extent true, if you focus too closely on the details, you'll lose the big picture. What is most important for fat loss is total calories, period and point blank. The type of activity you perform and the nutrition you use and even supplementation will all affect this, but without the right calorie balance, you will simply not have a net loss in fat.
interesting read....but I don't know how credible it all is...
excerpt
from:
http://www.bodybuilding.com/fun/likness10.htm
First, your body has something called energy systems that are used to fuel activity. Contrary to what some people may believe, your body draws on all of these systems, all of the time. The activity you perform, however, dictates which system is the one mainly being used (not exclusively). Just as your body always gets some of its energy requirements from protein, your body is always using a little bit of each system.
Two systems are anaerobic, which means they do not use oxygen. The ATP-CP system is used for short, intense bouts of work. Without getting too technical, a molecule in your muscle cell is split to generate energy, and creatine phosphate is used to rebuild that molecule so more energy can be produced. This system is especially important for high intensity activity such as weight training, but it only lasts for around ten seconds. Creatine supplementation can increase the capacity of this system.
The second anaerobic system is known as the lactic acid system or anaerobic glycolysis. This system is the predominant system for moderately intense activity that lasts around 2 minutes. This system uses glucose (a form of sugar) present in your blood, or glycogen stored in your muscle cell, for fuel. Post workout nutrition, such as shakes, may help recharge this energy system and keep you primed for the next workout.
The final system, and the one that takes center stage with aerobic activity, is the oxidative system because, yes, it uses oxygen. This system can use protein, carbohydrate, or fat for fuel, but relies mainly on carbohydrates. What is interesting about this system is that, depending on your heart rate; it will use more or less carbohydrate, protein, or fat. The lower your heart rate, in general, the more it will use fat for fuel rather than carbohydrate or protein. This is where science stops and pure speculation can ruin the whole affair. First, people get excited when they realize that the lower heart rate burns more fat. If you think about it, sitting at your desk or sleeping makes you a fat burning machine! While this is, to a certain extent true, if you focus too closely on the details, you'll lose the big picture. What is most important for fat loss is total calories, period and point blank. The type of activity you perform and the nutrition you use and even supplementation will all affect this, but without the right calorie balance, you will simply not have a net loss in fat.
interesting read....but I don't know how credible it all is...
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