Hi Michelle! This is probably the best explanation of what happens to the fat and calories you eat when you LC. It also explains why it's important to eat that fat and those calories - eating just protein is NOT eating LC, nor is it enjoyable or sustainable.

Scared to Eat FAT!

As for the exercising - if your current regime is too much for you as your body switches from burning glucose to burning fatty acids it will let you know. You may feel lethargic, tired and over all "blah". It takes a few weeks before this passes - decreasing the intensity, keeping water and calories at a consistent levle and taking the supplements recommended in the book will all help speed this up.

Cheers,
-Nat