It seems to help me if I do some exercise in the evening - after dinner.
YMMV.

Hi Ito ... I rarely eat much if anything before 10AM.    Exercise in the
AM sends my bg up so my exercise schedule is now dictated by
my particular T2 clock ... I exercise shortly after eating lunch.  I
did some heavy snow shoveling the other morning and my bg
went from 100 fasting at wakeup to about 130 after shoveling
snow.  My preferred time to exercise was always after work and
before dinner but that no longer works as I will go low.   My schedule
is what it needs to be for me, so that is now my routine.  I think
it would work equally well to exercise after dinner but that doesn't
fit my schedule.

cheers

Paul

Ever since diagnosis of Type 2 in 1995 I have always had this "liver dump"
thingy - where I both had high fbg, and often exercise would result in my bg
going up instead of down. Or, as in your case, it WOULD go down, but then
started bouncing up again! Now, at the age of 60, I have a heavy schedule of
commuting to work on my bicycle almost daily, a round trip of 25 kilometres.
Although I am quite certain that in the long term this has a beneficial
effect on my bg, it doesn't seem to be in the short term. I am just as
likely to get a specific bg reading after not having ridden as after having
ridden.

I do believe timing is very important. Having started my commuting, I would
ride almost immediately after having had breakfast. At the end of the ride
I'd get a spike. And the spike would persist for hours! Another poster,
Beavis, suggested I wait an hour after eating before cycling, and that did
it! The theory was - when I have breakfast, the bg from eating might not
start increasing for at least 45 minutes. If I start riding before then, my
liver thinks "hey, this fellow is active, and his bg needs boosting", then
the liver pumps glucose into my bloodstream. At the end of my ride, my bg
has gone up. Then the food also kicks in, and the bg goes up even further.

Even now, if I ride immediately after eating, I can be assured of a massive
liver dump. Every time. Strangely, there are other factors which may
influence my bg. For instance - when I ride to work during the week, a
dangerous exercise, as I ride on the highway in peak hour traffic - the
effect of the riding on my bg is minimal. However when I ride on a bike path
during the weekend, with vastly less traffic, then the bg lowering effect of
the ride is a lot more. This is even when having eaten a much larger
breakfast than the meagre single slice of MG toast I have each morning, and
despite me riding not more than half an hour after eating. Is it adrenalin
affecting my bg?

Of course I am basing all the above on my own observations, as I have not
researched the matter. I am happy to accept opinions and corrections to my
theories by anyone who has researched it deeply.

Henry Mydlarz
(19,000 kilometres of bicycle commuting since 2005)

Personally, I don't do anything before about 11am if I can help it; I
generally do something aerobic after lunch, and weights or karate
after supper.

I developed that routine when I was getting liver dumps from hell;
they're much less of an issue now, and I can do exercise in the
morning if I have to, but a dump is still a risk if I overdo it. I
don't like going high for any reason, even a good one like exercise,
and if I can avoid the issue by rescheduling, I will.

Nicky.
T2 dx 05/04 + underactive thyroid
D&E, 100ug thyroxine
Last A1c 5.6%  BMI 25