Know Your Numbers: Blood Pressure
Checking your blood pressure (BP) is a quick and easy way to measure the health of your heart. Let’s learn more about why your blood pressure is a number to know.
There are two different numbers in a blood pressure reading.
•The top number is the systolic blood pressure. This is the higher number and reflects the amount of pressure in the arteries when the heart muscle contracts (or “beats”).
•The bottom number is the diastolic blood pressure. This is the amount of pressure that remains in the arteries in between heartbeats, when the heart is relaxing and filling up with blood.
What your numbers mean
This chart shows the blood pressure categories that have been defined by the American Heart Association.
High blood pressure is often called “the silent killer” because it is a very dangerous condition that rarely causes physical symptoms. As your blood pressure rises above the normal range, so does your risk for conditions such as:
•Atherosclerosis (fatty buildup in the arteries)
The good news is that you can keep your blood pressure in check with a healthy diet and regular physical activity.* In some cases, though, medical treatment is still necessary in order to control high blood pressure.
If your blood pressure is above the normal range and was measured outside of your health care provider’s office, schedule an appointment for further evaluation.
Tips for an accurate blood pressure reading
- The blood pressure cuff should be the correct size.
- A cuff that is too small will falsely elevate the reading, while a cuff that is too large will falsely lower the reading.
- The cuff should be placed on a bare arm that is resting on a surface at heart level.
- Sit comfortably for 2 minutes with back supported and both feet on the floor before taking BP.
- If necessary, repeat measurement after a minimum of 30-60 seconds.
- Do not talk while BP is being taken.
- Do not smoke, exercise, or drink caffeine for 30 minutes beforehand.
[If you have been diagnosed with high blood pressure, refer to our Fit Fact, “Hypertension.”]
*Refer to our Fit Facts, “DASH Diet” and “How to Start an Exercise Program” for more information.
American Council on Exercise
American Heart Association
Chobanian, A., et al. (2003). Seventh report of the joint national committee on prevention, detection, evaluation, and treatment of high blood pressure. Hypertension, 42, 1206-1252.