Seems to reason to me that if you are on a TKD or Low Carb diet and you are training hard, that your body would be burning fat, some muscle and what little carbs you do ingest.
"Look son, there comes a time in every man's life when he has to make a decision. Do you want to be big, powerful, jacked, yoked-up, have women everywhere want you and men fear you . . . or do you want to do crossfit?"