So, your question is how does exercise effect blood sugar?
Your body uses sugar for energy, if your exercising the sugar will be moved from your blood, into your cells and burned for energy needed to do the exercise = lower blood sugar.
However, if you are intensely exercising, your body might release other hormones in response to the stress of the exercise, this might temporarily increase insulin resistance and mean you end up with slightly higher blood sugar post-exercise.
In my experience and from my investigating into how to get good blood control. It can be the opposite, depending on how your body gains the glucose and how it dispenses glucose, glucagon and glycogen. Also how your hormones react to exercise stimulus.
We all have different metabolic rates and how much food to help with exercise.
If you are in ketosis, I think you are
@Alicki , then your energy converts from muscle rather than carbs and sugars (glucose).
There is a lot of different views on how best to get the real benefits from exercise, where somebody who trains to be super fit can find it difficult to lose weight, whereas someone who just goes for a half hour walk will be trim and never suffer from weight gain.
I'm one because of those who doesn't do excessive exercise but works hard and walks and walks, then relaxes, if I want to lose weight, I can fast and being in ketosis should always be able to kick start my weight loss.
Exercise should be enjoyable no matter how you do it!
Be careful though, as it has been known for those with blood glucose disorders to hypo doing too much!
Hope this helps and doesn't confuse you even more!