Done low carb all but a few months of my 30 year T1D.
Used to go to gym and was a female gardener and had a pump.
Low carbing is great, due to other reasons I added in heavier fat such as cheese n cream and it really did not suit me. Instead I went for adding in oily fish, avocado, olives and pourings of olive oil dressings on my salads.
Now I am having fantastic salmon curries orchicken curries all home made. I was lean and mean for a female... Peanuts pre gym workouts gave huge rises in levels later. Always have walnuts or cashews or pistachios everyday.
Had a fantastic referral from GP to gym which gave me 1to1 personal trainer 2 or 3 hours each week.
Unfortunately other health matters have temporarily stopped gym and working as a gardener. Gardening will always be off limits now but at some point I will get back to the gym. Our gym referral scheme thru GP was/is superb. Instructor always made and recorded bloods before, during, after and also one hour after personal sessions and also watched BP and advised brilliantly to my needs.
Only ever once been over a size 10 in 30 years and that was die to being advised to eat carbs and three meals a day....
I have a totally unrelated illness that currently restricts life plus an additional atypical haemangioma in T7 of my spine to contend with.
However from all of this low carbing Has kept me diabetes complication free.
The additional probs regarding my stomach (that occurred after introducing carbs on advice) I do think occured due to having foods that weren't good for me. I am also intolerant to sweeteners/aspartame and preservatives which I dodn't know at the time..... So adding in things like bread and cereals effectively were killing me even more!! I believe this had something to do with my stomach becoming less effective but will never get proof.
However, being active and gym and on pump or MDI is possible... I'm proof of that...