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7 Common Mistakes To Avoid When Taking Your Blood Pressure

Person taking their blood pressure at home
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High blood pressure is called the “silent killer.”

Measuring your blood pressure is an essential part of monitoring your health. There’s a reason why most doctors and clinics will take it at the beginning of every visit!

High blood pressure, which is known medically as hypertension, generally has no warning signs but can lead to life-threatening conditions like strokes and heart attacks. So regular monitoring at home is important. It allows you to identify high blood pressure early on, giving you and your medical providers time to intervene before you face severe consequences.

With these readings being so vital, taking your blood pressure correctly is crucial. Following are some basic mistakes to avoid.

1. Never taking your blood pressure

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The No. 1 mistake you could possibly make when it comes to taking your blood pressure is not doing it at all. It’s the only way to know if you have high blood pressure, which, according to the National Institutes of Health, is called a “silent killer” because of its connection to potentially fatal health conditions. Unlike many other health conditions that manifest with noticeable symptoms, hypertension can quietly develop over an extended period.

Still, a 2022 study published in JAMA Network Open, a journal of the American Medical Association, found that even among patients who take medication for hypertension or have a hypertension-related health condition, less than half (48%) monitor their blood pressure.

2. Using an unreliable device

Confused man taking his blood pressure
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A health care provider can check your blood pressure during an appointment, and some places such as pharmacies provide free readings. However, having a device at home makes it easier for you to track your BP. But your device needs to be accurate. Regularly monitoring your blood pressure isn’t helpful if the readings are incorrect.

The American Medical Association keeps a list of accurate devices that the organization has vetted on its ValidateBP.org website.

3. Using the wrong size cuff

Person putting on a blood pressure cuff
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According to the American Heart Association, cuff size matters. A 2022 study found that devices often gave inaccurately high readings if the cuff was too small for the patient. Inversely, using a cuff that’s too large sometimes resulted in inaccurately low readings.

The study concluded that people who have a mid-upper arm circumference of more than 32 centimeters (12.6 inches) should use a large or extra-large cuff rather than a regular cuff. Those with a mid-upper arm circumference of 20 to 25 centimeters (7.9 to 9.8 inches) should use a small cuff instead of a regular one.

4. Drinking coffee, tea or soda beforehand

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Avoid consuming any caffeine within 30 minutes of taking a reading, as it can raise your blood pressure regardless of whether your baseline pressure is high.

You don’t necessarily need to avoid caffeine entirely, though. Johns Hopkins Medicine says that not everyone is particularly sensitive to caffeine. The institution notes that if drinking caffeine 30 minutes before taking your blood pressure spikes it by 5 to 10 points, then it may be time to cut back your caffeine intake.

5. Exercising beforehand

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Regular exercise is a key component of a healthy lifestyle, and it can help maintain healthy blood pressure, as we reported in “This Simple Exercise Lowers Blood Pressure the Most.”

Avoid working out or doing anything that would elevate your heart rate before taking a blood pressure reading, though. Exercising can temporarily increase your blood pressure for up to two hours.

6. Improper posture

Woman measuring her blood pressure in an improper position
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There’s a right and wrong way to position yourself during a reading. Make sure you’re sitting in a comfortable seat that’s supporting your back. The Centers for Disease Control and Prevention says you should sit there for five minutes before taking your blood pressure. Ensure that both feet are flat on the ground and your legs are uncrossed. And your arm with the cuff should be resting on the table at chest height.

The CDC also suggests you avoid talking during this time.

7. Only measuring once

Young man checking his blood pressure
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Always measure twice when monitoring your blood pressure at home. Harvard Medical School suggests taking at least one reading on each arm.

Readings may be higher in one arm than in the other. The difference should only be about 5 points or less. You should speak to a doctor if the difference is consistently more than 10 points, as that could indicate a health issue.

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