The debate about carbohydrate and lipid

The debate about carbohydrate and lipid loading has garnered considerable attention over the last several years as athletes appear to have questions about whether macronutrients can be considered as an ergogenic aid.

Comment on how carbohydrates and lipids can be utilized as an ergogenic aid for cardiovascular sports performance. Discuss which loading method, either carbohydrate or lipid, would be the best to utilize pre- and during aerobic competition.
Explain how carbohydrate or lipid loading could negatively impact aerobic performance as well.