Too late for me but there you go... wish I had got a bike ten years ago... 8)
"It appears that the pre-diabetic stage is a therapeutic window when aerobic exercise can make significant improvement in vascular reactivity and bring it back towards normalcy, before these patients progress to overt diabetes. It may be too late in the overt diabetes stage to make significant impact in vascular reactivity with exercise alone." On the other hand, the study found the group of pre-diabetic patients who did not exercise at all (exercise naive) had vascular reactivity levels as poor as overt diabetes patients.
Curiously in the past week we gave away the exercise bike, I much prefer my cross-trainer and even more so the actual bike. Got that back from the menders yesterday, my did I miss it. Now it has a mileometer too - did nearly ten miles yesterday. Best of luck with the exercise and motivation... we all need both! 8)