Normal blood pressure for both men and women age 20 and older is 120/80, according to the American Heart Association. Around one out of three adults in the United States suffers from high blood pressure.
The American Heart Association notes that readings that are consistently 120 to 139 systolic or 80 to 89 diastolic are ranked as prehypertensive, which indicates that high blood pressure may be in a patient's future. Distinctions between stage 1 and stage 2 hypertension are used to indicate the severity of the condition. Stage 1 high blood pressure is characterized by systolic pressure of 140 to 159 or diastolic pressure of 90 to 99, while stage 2 high blood pressure is classified as readings of 160 or more systolic or 100 or more diastolic.