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When your heart beats, it contracts and pushes blood through the arteries to the rest of the body. This force creates pressure on the arteries. This is called systolic blood pressure. A normal systolic blood pressure is below 120.A systolic blood pressure of 120 to 139 means you have prehypertension, or borderline high blood pressure.Even people with prehypertension are at a higher risk of developing heart disease.his is called systolic blood pressure. A normal systolic blood pressure is below 120. A systolic blood pressure of 120 to 139 means you have prehypertension, or borderline high blood pressure. Even people with prehypertension are at a higher risk of developing heart disease.
Systolic pressure measures blood pressure as the heart contracts and pushes blood through the arteries. Diastolic pressure is taken when the heart relaxes. Normal blood pressure is around 120/80 or lower. It is important to note that blood pressure varies from person to person and can fluctuate from moment to moment. One or two high readings does not necessarily mean that you have hypertension or high blood pressure.