 [ Symptoms ] my heart rate often goes as high as 170 beats per minute when i exercise i am in my mid 60s should i worry about this i monitor my blood saturation and it sometimes drops into the low 90s i have been doing this same kind of workout squash for 18 years [ Disease ] high blood sugars like you are describing are concerning you may want to speak with your doctor about referring you to see an endocrinologist who specializes in diabetes in some cases the hemoglobin a1c test can give false results this sometimes occurs in people with certain conditions like thalassemia or sickle cell anemia people with these conditions can have a type of hemoglobin that is less common and can affect the results of some a1c tests there are also other medical conditions that can affect a1c test results here is a link to an article that discusses in detail the aic test <link> take care