Bill, sounds like you're experiencing a magnesium deficiency. When you hit ketosis your body flushes out excess water - along with the water you lose electrolytes and minerals. Replacing potassium, magnesium and calcium will generally alleviate your problem. I know I had night cramping when I began this WOL and w/in one day of supplementing with cal/mag the symptoms disappeared.

You can get info on supplement doses and times here:

Cal/Mag and K

and you can find out about the effects of their lack here:

Cramping
Fatigue / Headaches

Be sure that you are drinking sufficient water as well (2 litres minimum) - it will help with the symptoms and it will help with the fat loss.

Hope you're feeling better soon
Nat

P.S. It's advisable that you wait a good 2 weeks before starting any exercise program while LCing. Your body will need time to adjust to a new fuel - once Induction is over try adding exercise back slowly to your day. It will take some time to get back to a pre LC intensity, but you'll get there.