more protein is fine with ketosis, even fat is (you just have to watch the calories) you could eat loads of meat and stay in ketosis, but you still need to be careful with exercise -I exercise, have an active job, and I did this last time I was on a VLCD, I lost the same as people doing no exercise (though I kept it off really well) you have to be very careful with cardio. To be honest you could probably have slightly more carbs than allowed to help with exercise, but Im not sure what the best thing to eat would be, perhaps vegetables or beans