Hi
@Bexter1111. Firstly can I say that I'm not a pump user, good old fashioned mdi.
As for resistance training. It's a real dilemma. Every time I push myself on the weights I can guarantee my sugars will go crazy high. The big temptation is to perform a correction dose after exercise, which I have done myself in the past. Problems then arise upto 6/8 hrs later when blood sugar drops drastically, usually whilst in bed.
Prior to starting using a Dexcom CGM I would always wait until my next meal, dose for the meal and take a correction dose at this point in time. It was always a bit hit and miss I have to admit.
Since using the Dexcom I can gather far more information such as when my sugars start to rise whilst training,how long I continue to climb after exercise, when I plateau and when I start to drop and at what speed.
With all this information I now inject insulin prior to a heavy session, a bit scary at first, but caution and monitoring led to some interesting results. Obviously what works for me on mdi won't necessarily work the same way for you on a pump but I would say give it a go. Insulin prior to training. Be cautious and check regularly to see how it goes. Keep plenty of hypo treatment close to hand.
For me. If prior to my workout I was 7 then I would have 3 units novorapid about 15 mins before I started workout. An hour later I'll be somewhere between 7 and 10 at the end of my session. The following 2 hrs post gym stays fairly stable as IOB counteracts the adrenaline in my system.
Not sure how relevant any of this is for you and your pump. Nonetheless I hope you find something that works for you.
Good luck