Lets discuss what these numbers actually mean. The top number would optimally read 120/ is your Systolic blood pressure. This measures the force your heart exerts on the walls of your arteries each time it beats. The bottom number which would optimally read /70 is your Diastolic blood pressure. This measures the force your heart exerts on the walls of your arteries in between beats as it re-fills. Normal: Less than 120 over 80 (120/80) Elevated: 120-129/less than 80 Stage 1 h