Simply supplying your body with increased fat intake and decreasing carbs to 50grams does not guarentee you are burning fat effectively. In training your aerobic system you are training your body to burn more fat. Push beyond into an anaerobic state and your body fast-buring fuel in the form of carbs this results in more sugar cravings and overtraining risks. A strong aerobic system will allow you to go longer faster without “hitting the wall” and prevent injury.
The Maffetone Method defines a simple way to ensure you are training at your maximum aerobic function. The formula is:
this is then tweaked by the following grouping:
a) If you have or are recovering from a major illness or are on any regular medication, subtract an additional 10.
b) If you are injured, have regressed in training, get more than two colds or bouts of flu per year, have allergies or asthma, or if you not been training at least 4x/week for 2 years, subtract an additional 5.
c) If you have been training at least 4x/week for 2 years without any of the problems just mentioned, keep the number
d) If you have been training for more than 2 years without any of the problems listed above, and have made progress in competition without injury, add 5.
Do not bump yourself up to the higher category just because your ego is in the way or to cut corners. Patience, Persistence and Pride is not achieved by cutting corners.