Hi
@parkinsonryan,
Welcome to the site!!
Have you just returned to work after being diagnosed and prescribed insulin?
Just that exercise does affect how well insulin works and thus can cause blood sugar levels (BSLs)
to go low (like the 2.5 mmoml/l) you mention.
When BSLs go low (called hypoglycaemia - hypo = low, -glyc - = glucose, -aemia = in the blood)
or hypo for short - our liver reacts by releasing stored glucose to raise the BSLs.
I call it the hypo-hyper see-saw (hyper - = high).
If you think this is the case the best bet is to contact your nurse or doctor to discuss how to manage this.
Basically for exercise I can either reduce my insulin which is acting at and after the exercise, or eat extra beforehand
or do a bit of both.
Each of us is different as to which works best so best to have your health team advise you.
If you look at the Home page and under 'Type 1 Diabetes' - you can read about hypoglycaemia and
how do treat it there.
I hope that helps but please post further if you wish.
More detail may help to sort out what exactly is happening!!
Best Wishes.