Alin75 answered Sunday January 4 2009, 8:16 pm: Carbs are an important source of energy. They are the easiest thing you can burn, and become of increasingly greater importance as the intensity of activity increases.
In normal diets fats and carbs are used for energy. During periods of low intensity activities (everything from sleeping to walking), fat is the dominant source, but as intensity increases, carbs become the primary fuel.
Low carb diets induce a state called ketosis, where fat is converted to ketones which are then used for energy. This condition is what occurs during starvation as well, and it is the body's way of preserving glucose for essential functions. Its not necessarily bad, but it is certainly not yet totally accepted (in all honesty I am not a fan of the low carb diet for a few reasons I won't go into here).
Now, your body will adapt and your energy levels will not always remain this low, many people function very well on a low carb diet. However do not expect to be able to perform strenuous activities (e.g. sports) as well as you could when you were eating carbs. [ Alin75's advice column | Ask Alin75 A Question ]
charmedp04 answered Sunday January 4 2009, 3:44 pm: your body is just not used to the change yet. you might feel tired for a couple more days. but don't quit. i think this diet is a good idea and you're being smart about it. trust me. in a few more days you'll be used to it and you won't be tired anymore. [ charmedp04's advice column | Ask charmedp04 A Question ]
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