nice article indeed- When Malto gets a chance he'll have to explain this one better to me- Also related to this question, Malto from WhiteBlaze.net asks, “Will eating fats while hiking increase your total caloric contribution from fat, or will it reduce the calories that your body burns from fat, keeping it constant?”
Great question. If you're consuming a high fat diet, the body will utilize fat as an energy source and spare glycogen. If you can get to the point where you tap into your fat stores, then you will be a fat burning machine. Keep in mind we only have about 2000 calories from carbohydrate available to use during activity until we have to replace it. We have over 100,000 calories from fat available for use but we rarely tap into those stores because we're always consuming refined carbohydrates which prevents us from burning fat as fuel.