I'm not so sure about the needing carbs for energy thing. I go to the gym on an empty stomach at around 12 noon, and do heavy bench press and deadlift -- and hit my personal best sometimes. This is without food in my stomach for 18 hours.
I've been doing this for a year, even before starting the ketosis thing -- which I have done here and there for the last few months, but only now am I getting serious about it.
__________________
|