The Best Answer
To be honest you don't. That is why it is recommend to limit your exercise when on a really low carb diet. The slow carb diet is not a low carb diet. Eat lots of legumes and vegetables and you should have lots of energy.
Personally I use coffee and water to keep my energy up while I am fasting in the mornings. If I work out fasted I sometimes use a pre-workout supplament like anaburst or jack3d.
Extremely low carb diets like CKD should only be used temporarily when you are already 12-15% body fat and trying to get to single digits.
How long have you been on it? Starting the SCD is a big adjustment for most at first but after the first few weeks-month, it gets better. I think we are in carb/sugar withdrawal so we don't feel great/lightheaded-we are also figuring out what works best for us. I got through it by eating some protein such us nut butter on celery, almonds, guacamole w/carrot chips (carrots cut like chips), & hard boiled eggs...I also enjoy afternoon coffee, Yerba Mate Tea, and even Motrin to be honest. When I downhill ski, I bring little baggies of raw almonds and allow myself a Luna bar. Before the SCD, I couldn't drink caffeine past morning or I couldn't sleep, now it doesn't affect my sleep at all! If you are consuming enough calories (protein/good fats-EVOO, flax oil, fish oil) for your body via SCD foods, you should be okay soon. I noticed that I perform better when I have spinach in my meal prior to a workout. I also recently added Gold Medal Aminos after reading Dana Torres' new book (which I did because I am around her age/body type). I've had to adjust every time I've added a twist/another component to this diet, such as protein fasting, and reducing calorie intake (I know you aren't supposed to do that but I was gaining more muscle that I wanted-a nice problem to have ). Overall, I perform everything better, faster, more efficiently, & with greater agility since being on the SCD. I hope that helps some. Good luck!
p.s. There is a diabetic lady on the Tim Ferris Discussion Group board on Facebook, she has been doing great and is a great source of info and support (her name is Suzette).
If your energy is down you're likely not eating enough beans. Remember this isn't LOW carb it's SLOW carb - there are tons of good carbs in beans and the reason they're chosen over breads and rice and pasta is because they have neglegible amounts of protein and they pass through your body quickly, leaving you hungry even when you don't need more food.
Beans have always been (in my experience) the energy lifter. On days where I haven't eaten enough beans I really feel it.
In my humble opinion, you should eat more of the approved slow carbs..IE..kidney, pinto, black, refried beans. I understand after reading on here that alot of people seem to be transforming this diet to LOW carb instead of its intentioned SLOW carb. Hmmmm, perhaps the Atkins diet was right after all...but I digress...simply eat more of the low glycemic carbs.
caffeine pills have really helped me. I don't drink coffee and Tea wasn't enough. I have noticed that I get angrier more quickly on caffeine but that could just be because my average daily consumption of caffeine was like one red bull every 3-4 months before hand, so Im not really used to it yet. Could also be that its finals time for class and its my junior year in ME.
I have issues with beans. I probably dont eat enough of them either. I have to study everyday and that requires me to be mentally alert, and being low energy doesnt help. This is what I did:
Meditation. Thats it.
Specifically, I used these three perquisite meditation techniques:
1) Deep Breathing. The brain uses 3 times the oxygen then any organ. Most of us breath shallowly. There are techniques to permanently breath deeply. More oxygen intake per day will give you a big energy boost.
2)Deep Relaxation. There are people in the Asian continent that can travel long distances with low amounts of sleep. This is how they do it.
3)Deep Contraction. Blood circulation is improved.
You dont even have to meditate, the above three techniques will make you feel great. Certainly better than your current state.
Actually meditating has other benefits, but there are many techniques out there each with different benefits. Meditation as a whole however is about self growth I think. If your just looking for energy, the the techniques/exercises above will suffice. Google them.