INS and type 1 diabetes mellitus: One lowest common denominator that may affect risk factors such as glycemic control, blood lipids, chronic inflammation, and weight gain is physical activity.29 CGM has been used frequently in exercise studies in people with type 1 diabetes.10 Some people with type 1 diabetes are insecure of insulin dosing and afraid of hypoglycemia close to physical activity and therefore may refrain from heavy exercise.