I honestly don't think hard work has a whole lot to do with A1Cs. At least for me.... Before puberty things were pretty manageable and I had A1Cs in the 7s with a moderate amount of effort. I used a pump and then a CGM at age 13. I tested myself around 10-12 times a day and my parents tested me around every 2 hours at night. We weighed all my food at home and when I was out with my parents. Then puberty happened when I was 14 and all hell broke loose. All of a sudden my basal needs varied from 6 units to 60 units a day with no pattern whatsoever. I also wanted more independence and was sleeping over at a friends house at least 1 night a week and going away for the weekend for sports. We worked sooooo hard. I was in constant contact with my parents while trying to be a normal teen--- and it was tough when all I wanted was to pull away from them. I was testing 15+ times a day while wearing a CGM. When I was home at night my parents tested me basically every 60-90 minutes and adjusted basal. While away I had to set an alarm to go off every 2 hours and call my parents. I swear almost every day we saw 40s and 400s. At that point my A1Cs were in the 8-9 range and we were thrilled with that. We could not have worked any harder or made better use of the technology we had. I don't think puberty is that tough for everyone but some people with type 1 do see those crazy varying basal needs that make it difficult to manage. Things have gotten so much easier in the past few months (I have a theory that I was in the tail end of puberty until very recently---I randomly grew 1.5 inches last year). I have A1Cs in the 5s with 1/100 of the effort from when I was younger. My carb ratios are basically static and basal does not vary tremendously. So, I think it is a bit insulting to say all it takes is hard work to get good A1Cs. In my experience the level of effort (above a certain point) put in does not have that significant of a correlation to the A1C.