This article describes issues lurking unseen for inactive people. I have the inverse. I'm one of the more active people I know: lots of walking, biking, swimming, hiking (with a heavy pack). I like to do outside work like digging and chopping firewood, etc. Yet, my blood glucose went prediabetic a couple of years ago (I'm 45). I actually eat very well too, lots of greens and whole grains, mostly vegetarian (my wife is a dietitian). I rarely eat sweets.
So, I have the inverse issue: instead of being inactive with an unobserved symptom, I am active with an observed symptom.
Alas, I haven't been able to get any relevant medical advice because the answer is always: diet and exercise. And, while I suppose I could find some way to improve my diet and exercise to some degree, I'm clearly above the norm. And, when I got a referral to an endocrinologist, they ended up canceling the appointment without seeing me because I'm only prediabetic.