I've been a competing athlete, mostly in endurance sports for nearly 45 years now. As part of military and other physicals, I have had blood glucose levels come back several times with high levels, and follow up Fasting Glucose Tolerance Tests come back as negative. In one of my most recent blood panels (for a medical study group) came back with HbA1c levels that indicated I was prediabetic, but again, follow up studies were negative.
Recently I read a blog post discussing this study, which indicated that highly trained endurance athletes (In this case, a cohort of 47 professional and 72 elite male cyclists, compared to 58 sedentary donors) trended higher HbA1c levels than the sedentary group.
I have also read that many of the blood glucose levels were established using diabetic patients, so does that mean that the levels are not valid for me since I am a lifelong endurance athlete? Or is this something that I should just keep following up with potentially unnecessary tests?