I totally get the staying busy as a distraction while fasting – I cannot even think about on weekends, for example, but if I’m in the office during the week it’s more achievable (sometimes…).
Deep ketosis is interesting, others may know more. In that original link that JGwen posted, to the video clip, the guy measured 0.54 or something like that and said that meant he was “just” in ketosis. I don’t think he meant that literally, I think he meant he was getting “just” into peak fat burning. I think he was aiming for around 1. I have never yet been anywhere near that!! I have seen that when people are doing it for really strict medical reasons, like trying to manage the risk of a brain tumour regrowing, they seem to aim for well over 1. But, they are also using much more accurate machines than our little devices. I have also seen links from diet doctor saying that as we get more keto adapted we actually use ketones more efficiently and stop “leaking” them into the breath. So that means what we measure on the breathalyser would theoretically go down despite the fact that we are perhaps using ketones almost completely.
So I think that maybe up to a point a higher number is associated with more fat burning, but if you get really adapted then the number might fall and still be a good sign? I really hope JGwen is around to comment on this, she may know more!
Also, do remember that our little devices probably aren’t super accurate: I think 0.6 sounds really good! I am often well below that. I haven’t had my breathalyser for a longer fast yet – I am hoping for one this week but I said that last week and couldn’t do it – but when I manage it I will be really interested to see if/how much the numbers change.
I really hope you can stick with this despite the frustration, I’m sure you’ll break this stall eventually. xx