I'm typically on 4-8 units per day, not per meal.
That is through combination of low carbs, and the exercise to improve insulin sensitivity. On the bike I typically need an extra 25g/hr of carbs with my pump turned down to 20% of its normal. Most texts on diabetes management would have me eating anywhere from two to four times that.
As well as gluconeogenesis, you rely on increased insulin sensitivity, additional mechanisms like GLU4, and a trai ed fat burning metabolism at audax speed.
The handyy thing is that the increased insulin sensitivity lingers afterwards, which is a problem right now as I recover from my pelvic fracture, and I've been needing to increase my background insulin by 20% instead. Just about ready to get back to it now.
As an example of control regime my target levels are 4-6mmol/l on waking, and 4-8 otherwise. At my last check up I was 98% in target. This is referred to as tight control. I'm not there right now, will be interesting to see how the accident has affected my HbA1c at the clinic on Monday.