A) Yes, you can. Muscles fatigue more easily when you're in ketosis, but since you're used to lifting on a keto diet, that shouldn't be an issue. You might be more comfortable increasing carbs to your CCLL or even a bit beyond it (the intense workouts may allow you a few extra carbos). Or you might feel absolutely fine on 40/day. Everybody has a slightly different experience with it, apparently. For myself, I have to eat something with about 15 carbs immediately pre-workout, otherwise I "bonk" when lifting, and when that happened on a bench press with no spotter, it was really frightening--hence, the pre workout snack which I should have been doing all along anyway.

B) I don't know anything about Cal/protein cycling, but there are loads of better informed people on the BFL board. Someone will know.

Emily