Not to start an argument, but the statement that you need more carbs is not backed up by Atkins or what research I have been able to find. What Atkins said in the Larry King interview is that you have to be on the plan long enough for your system to convert, after that there should be no preformance hit. There is a study done on female athletes at the University of Buffalo that showd both strength and endurance increaseed on a low carb diet. For any kind of endurance, the body's glycogen stores are exhausted after about 20 minutes and then anybody is running on fat. The important point is the your body has to adjust to the wol, which takes a few weeks.
Both the Inuit and Masai peoples who stay on their traditional diets show great endurance on little or no carbs. the Inuit live in the most hostile climate, the Arctic, know and didn't have access to carbs until the Europeans showed up. The Masai diet is milk, meat and cattle blood, and they traditionally hunt lions with spears. They are still feared by all their neighbors as a fierce people. Being cattle herders, they travel long distances to follow the cattle. Nyah Levi