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Normal ketone values?

I feel fine, in fact really good.

I was wondering about rounding it up to a 200km ride, but would have needed to stop to eat something vaguely substantial as I was sitting around 4mmol/l for the last 45min and didn't really fancy eating more Skittles - I should have stopped and bought something salty which is what I was craving a little bit earlier.

I'm not really tired at all (legs feel about the same as they did yesterday after a 55km ride with some uni friends, today's ride seems to have made little difference, my only complaint is that I lost an hour in bed due to the clocks changing and had to get up reasonably early to arrive for lunch today 🙂).

If I needed to would be happy to roll out the door and do the whole thing again now (though I am feeling quite full and have bolus on board, which may not help, plus I'd need to charge lights/computer/etc! :D)).

P.S. I should add that while I would ride again, I don't think I'd be very fast despite my legs feeling fine. Feeling fine and working optimally are not the same things!

P.P.S. The wonders of post-exercise endorphins; I did, however, feel rather tired the day after, not helped by not sleeping well (which I often find after a long ride - low HRV/slightly elevated resting HR/etc.) Nothing to do with ketones I don't think tho.
 
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Gosh! Slightly surprised at that high-ish level of ketones. I wonder if that was you burning fat?

Would be interested to hear what a sports-specialist Endo made of your data (someone like Rob Andrew from Extod maybe?)

I wonder if people like Henry Rugby Bloke get high-ish ketones too (too late on a Sunday for my brain to be working!)
 
It would indeed be interesting to know what ketone levels people have post-exercise, though it's hard enough to get information on BG values and insulin dosing approaches for professional athletes so I'm not holding my breath.

If I burned ~4600 calories (which should be fairly accurate as I have a power meter on the bike), carbs are 4 cal per g, which is 4x155 = 620 cal. I wasn't eating pure carbs, so perhaps round it up to 1000cal consumed (I can sit down and work it out exactly as I know what I ate). So I definitely had a deficit so must have been burning quite a bit of fat.
 
To set your minds at rest, I just did another test and they are now 1.4mmol/l (Ketones) and 8.2mmol/l (BG).

So apparently they drop off quite quickly, I'll try to remember to do a test as soon as I walk in the door after the next big ride.

I presume I'm in ketosis due to fat burning. I can see there is perhaps a potential danger of DKA with basal reduction (which I do) and no bolus for food during the day if the basal reduction is too severe (which I have done in the past by accident and didn't need to eat for 5h+ - though I didn't feel too terrible, just really really hungry and tired). Though I don't know whether this a real risk, or whether having some basal on board is sufficient to avoid DKA even if it isn't enough to cause a drop in BG coupled with exercise.

As you say @everydayupsanddowns a question for a sports-specialist endo. I could reach out to my consultant, who knows him, to see what he thinks.
 
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