ARTICLE

Normal Blood Pressure Range: Does It Change with Age? Home Measurement Tips

12-min read

Updated on 2026-7-30

Author: AIA Content Editorial Team

Woman using a blood pressure monitor and smartphone app to track blood pressure readings and manage hypertension risk.

What Is Normal Blood Pressure? Understanding Systolic and Diastolic Blood Pressure

Only by clearly understanding what normal blood pressure means can you more accurately assess your cardiovascular health. Blood pressure refers to the pressure exerted on the walls of blood vessels as blood flows through them. This pressure is the key force that helps circulate blood throughout the body and deliver oxygen and nutrients to different organs. When we measure blood pressure, the blood pressure monitor usually displays two readings in millimetres of mercury, or mmHg. These two numbers represent different physiological meanings in relation to how the heart functions.

Systolic blood pressure: also known as the upper reading, refers to the highest pressure exerted on the blood vessel walls when the heart contracts and pumps blood into the arteries¹.
Diastolic blood pressure: also known as the lower reading, refers to the lowest pressure exerted on the blood vessel walls when the heart relaxes and prepares for the next contraction¹.

It is worth noting that blood pressure is not a fixed number, but a dynamic reading. Our blood pressure levels fluctuate continuously according to our physical condition and external environment¹. For example, when you are emotionally excited, feeling stressed or have just completed strenuous exercise, your blood pressure may rise temporarily. On the other hand, when you are resting quietly or in deep sleep, your blood pressure naturally falls. Therefore, we should not determine that we have a medical condition based only on a single spike in blood pressure. Understanding the dynamic nature of blood pressure correctly and monitoring it regularly are the proper ways to assess vascular health.

Normal Blood Pressure Range: Defining Prehypertension in Adults

Many people are unsure whether their blood pressure levels are within the target range after receiving a health check report. According to a booklet prepared by the Health Bureau, hypertension refers to pressure on the blood vessel walls that is higher than the normal level. If the systolic blood pressure is equal to or higher than 140 mmHg, or the diastolic blood pressure is equal to or higher than 90 mmHg, it is considered hypertension². To help you better understand your health condition, we have prepared the following normal blood pressure range table for adults.

Blood Pressure Category	Systolic Blood Pressure mmHg	Diastolic Blood Pressure mmHg	Common Follow-Up Actions
Ideal blood pressure	< 120	< 80	Blood pressure is within a healthy range, but regular health maintenance is still important. Blood pressure should be measured once every two years.
Normal blood pressure	120 - 129	80 - 84	Blood pressure is within a healthy range, but regular health maintenance is still important. Blood pressure should be measured once a year to track health trends.
High-normal blood pressure / Prehypertension	130 - 139	85 - 89	More active lifestyle improvements may be needed. Blood pressure should be measured once every six months for closer monitoring.
Hypertension	≥ 140	≥ 90	Medical advice should be sought as soon as possible, and treatment or medication should be followed according to the doctor's instructions.

Does Normal Blood Pressure Change with Age? Understanding the Risks at Different Life Stages

Some people may think that as they grow older, blood pressure standards should become more "relaxed". In other words, they may assume that slightly higher blood pressure in older adults is normal. According to the standards of the Health Bureau, if an adult's blood pressure consistently remains at 140/90 mmHg or above, it will be diagnosed as hypertension. The normal blood pressure range does not change simply because of age².

However, age is indeed closely related to the risk of developing hypertension. As people age, their blood vessels gradually become older, lose their original elasticity and become hardened. This can directly lead to higher blood pressure and may cause coronary heart disease³. According to data from the Department of Health in Hong Kong, the prevalence of hypertension among adults in Hong Kong rises sharply with age. Among young people aged 15 to 24, the prevalence rate is only 4.9%. However, among older adults aged 65 to 84, the prevalence rate rises significantly to 57.4%⁴.

Most patients with hypertension have no obvious symptoms in the early stages, so the condition is easily overlooked. If hypertension is not effectively controlled, it can increase the risk of heart failure, coronary heart disease, kidney failure and stroke². Therefore, you should not ignore the importance of regular blood pressure monitoring, even if you are young, have a standard body shape or do not feel unwell.

Measuring Blood Pressure at Home: Correct Steps and Key Precautions

When measuring blood pressure in a clinic, many people may feel nervous in front of healthcare professionals, leading to higher blood pressure readings. As a result, measuring blood pressure at home can often provide data that is more realistic and more useful for reference. The following are the steps and precautions for measuring blood pressure at home.

How to Choose a Suitable Blood Pressure Monitor?⁵

Home blood pressure monitors are generally divided into two types: upper-arm monitors and wrist monitors. In general practice, a clinically validated upper-arm blood pressure monitor is usually preferred. This is because the measurement site is closer to the heart, so blood pressure readings can be measured accurately as long as the arm is relaxed. In addition, choosing the correct cuff size is also very important. A cuff that is too loose or too tight can directly affect the accuracy of the reading.

Preparations 30 Minutes Before Measurement⁶

Avoid exercising within 30 minutes before taking a measurement.
Do not smoke, eat or consume caffeinated drinks.
Before measuring your blood pressure, it is recommended to sit quietly and rest for at least 5 minutes so that your body and emotions can calm down.

Correct Sitting Posture and Measurement Method⁶

Sit on a chair with back support, with your back resting firmly against the chair.
Keep both feet flat on the floor and do not cross your legs.
Place the arm wearing the cuff flat on the table, and make sure the cuff is at the same level as your heart.
Stay quiet during the measurement and do not talk.
If you need to repeat blood pressure measurements within a short period of time, it is recommended to leave at least 1 minute between each reading. Since the first reading may usually be slightly higher, you may take the average of the first two readings as a reference. If the difference between the two readings is more than 5 mmHg, you should measure again. The average of the three readings can then be used as the final reference value⁷.

How to Maintain Healthy Blood Pressure?

To maintain a normal blood pressure for adults, it is especially important to develop a healthy lifestyle. Readers may refer to the following points⁸.

Reduce sodium intake: A high-salt diet is a major cause of rising blood pressure. Ideally, daily salt intake should be less than 1 teaspoon, or about 5 grams. You should also reduce your intake of processed meats and high-sodium seasonings.
Maintain a balanced diet: Eat more fresh vegetables, fruits and whole grains, and choose low-fat or fat-free dairy products. A diet rich in potassium, calcium and magnesium can help support healthy blood pressure levels.
Exercise regularly: Engage in at least 150 minutes of moderate-intensity aerobic exercise or 75 minutes of vigorous-intensity physical activity every week. Activities such as brisk walking, swimming or cycling can help strengthen heart function.
Maintain a healthy body weight: Being overweight increases the workload of the heart in pumping blood. It is better to keep your body mass index, or BMI, within the ideal range of 18.5 to 22.9 where possible.
Manage stress and quit smoking: Long-term stress can cause blood vessels to constrict. Smoking can also accelerate the hardening of blood vessels. Learning to relax and quitting smoking as early as possible are highly beneficial to vascular health.

If blood pressure is not properly controlled over the long term, it may lead to serious complications of hypertension, such as coronary heart disease and stroke. Therefore, in addition to regularly monitoring blood pressure and improving lifestyle habits, you may also review relevant medical and critical illness protection arrangements early according to your personal health condition and family needs. This can help you prepare for possible future health risks.

Normal Blood Pressure Range FAQs

Not necessarily. As mentioned above, blood pressure is a dynamic reading. It can be affected by emotional changes, stress, fatigue or activities before measurement. A single high blood pressure reading may only be a temporary physiological response. You should repeat the measurement on different days and at fixed times. If the readings continue to exceed the healthy blood pressure range, you should consult a doctor as soon as possible for further diagnosis.

This situation is very common. Many people feel nervous without realising it when facing healthcare professionals or staying in a clinic environment. This may cause a temporary spike in blood pressure. In addition, differences in the measurement environment and the calibration of the blood pressure monitor may also affect the readings. You may bring your home blood pressure monitor to the clinic and ask healthcare professionals to help compare and calibrate it.

No. Hypertension is a chronic disease. When blood pressure returns to normal, it is often because blood pressure medication is working. If patients stop taking medication or reduce the dosage on their own, blood pressure may rebound quickly. This may even increase the risk of acute cardiovascular disease. Any adjustment to medication dosage should be made according to the instructions of your attending doctor⁹.

Yes. Although obesity and older age are high-risk factors for hypertension, the causes of hypertension are quite complex. They are also strongly affected by multiple factors, including family history, a long-term high-sodium diet, lack of exercise, insufficient sleep and heavy life stress. Therefore, regardless of body shape or age group, no one should take it lightly. Everyone should develop a good habit of measuring blood pressure regularly.

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^{This information is general information and for reference only, and should not be considered as a medical, diagnosis or professional recommendation, and cannot replace any medical, diagnosis or professional recommendation from doctors. Independent professional advice should be sought from an appropriate qualified medical professional (such as doctors) before making any decision on the topics mentioned above. Treatment may vary according to individual circumstances. If in doubt, you may ask your doctor. If necessary, you may seek other medical advice as soon as possible and do not ignore or delay seeking medical advice / treatment. AlA assumed no liability for any loss or damage arising directly or indirectly from the use, misuse, understanding or application of any of the above information.}

^1.Centre for Health Protection. Hypertension. 2023. https://www.chp.gov.hk/en/healthtopics/content/25/35390.html

^2.Health Bureau. Hong Kong Reference Framework for Hypertension Care for Adults in Primary Care Settings. 2024. https://www.healthbureau.gov.hk/pho/rfs/src/pdfviewer/web/pdf/hypertensioncareforadults/tc/coredocument/15_tc_hypertension_care.pdf

^3.Elderly Health Service, Department of Health. Coronary Heart Disease. https://www.elderly.gov.hk/english/health_information/hypertension_heart_disease/chd.html

^4.Department of Health. Report of Population Health Survey 2020–22 Part II. 2023. https://www.chp.gov.hk/files/pdf/dh_phs_2020-22_part_2_report_eng.pdf

^5.Consumer Council. 血壓計：自我監察血壓好幫手. https://www.consumer.org.hk/tc/shopping-guide/tips/2020-tips-blood-pressure-meter

^6.Centre for Health Protection. How to monitor blood pressure at home Script - Video Announcement. 2013. https://www.chp.gov.hk/en/static/28498.html

^7.The Hong Kong Association for Health Care. 自測血壓必須知道的事. 2017 https://www.healthcarehk.org/2017/11/%e8%87%aa%e6%b8%ac%e8%a1%80%e5%a3%93%e5%bf%85%e9%a0%88%e7%9f%a5%e9%81%93%e7%9a%84%e4%ba%8b/

^8.Centre for Health Protection. Hypertension - the Preventable and Treatable Silent Killer. 2013. https://www.chp.gov.hk/en/features/28272.html

^9.Centre for Health Protection. Reminder for People with Hypertension. https://www.chp.gov.hk/en/static/90082.html

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Normal Blood Pressure Range: Does It Change with Age? Home Measurement Tips

What Is Normal Blood Pressure? Understanding Systolic and Diastolic Blood Pressure

Normal Blood Pressure Range: Defining Prehypertension in Adults

Does Normal Blood Pressure Change with Age? Understanding the Risks at Different Life Stages

Measuring Blood Pressure at Home: Correct Steps and Key Precautions

How to Choose a Suitable Blood Pressure Monitor?⁵

Preparations 30 Minutes Before Measurement⁶

Correct Sitting Posture and Measurement Method⁶

How to Maintain Healthy Blood Pressure?