Because you have so little to lose and it will be slower coming off, it's tempting to go real low carb. I doubt you can keep up that level of exersize with real low carb.

DANDR says regular exercisers can still lose at 60-90 carbs a day.

How many carbs a day are you eating?

Also, most people can't have heavy workouts at the same level during induction or beginning a low-carb WOE. Atkins also addresses this in the book. I think it takes a while for your body to adjust to a new fuel.