Help! I get lightheaded and blurred vision when I exercise?

See your doctor. Vision change and lightheadedness with exercise might signal a problem with your heart rhythm, blood pressure or blood flow to your brain. You need to see your doctor.
Exercise, blurred. Before anyone should engage in an excercise program your overall level of fitness and health should be checked by a physician. Heart disease, carotid artery insufficiencies, certain medication such as used to regulate blood pressure can affect exercise tolerance and thus create lightheaded or blurred vision.