Blood-Pressure-Friendly Habits: Everyday Steps and Reliable Home Readings

Everyday habits influence blood pressure. Diet and exercise have trial evidence behind them, and health agencies also advise keeping to a healthy weight and limiting alcohol. Sleep and stress are linked to blood pressure as well. These habits support healthy blood pressure, but they are not a substitute for medical care. If you have a diagnosis or take medication, follow your care team's plan, and never change a medication because of an app, a wearable or a single reading.

Why blood pressure matters

High blood pressure is common and often silent. The WHO's hypertension fact sheet explains that people with high blood pressure may feel no symptoms, so you can only find out by having it measured. Left untreated, it can lead to heart disease, stroke and kidney disease. The NHS overview agrees, and suggests a check at a pharmacy or GP surgery if you might be at risk.

Habits health agencies recommend

The CDC's guide to preventing high blood pressure comes down to a short list of everyday habits:

Eat well, with less sodium. Build meals around foods that supply potassium, fibre and protein, and go easy on salt and saturated fat.
Keep to a healthy weight.
Move regularly. The CDC suggests at least 150 minutes of moderate-intensity activity a week for adults, such as 30 minutes on five days.
Don't smoke. Your doctor can help you quit.
Limit alcohol.
Get enough sleep regularly.
Manage stress, and talk to your care team if long-term stress, anxiety or low mood is affecting you.

For eating, the NHLBI's DASH eating plan (Dietary Approaches to Stop Hypertension) is a flexible pattern rather than a strict diet. It builds meals around vegetables, fruit, whole grains, low-fat dairy, fish, poultry, beans and nuts, and limits saturated fat, sugary drinks and sweets. Its daily sodium limit is 2,300 mg, and cutting to 1,500 mg brings a bigger drop in blood pressure.

Exercise has trial evidence behind it too. A 2013 meta-analysis by Cornelissen and Smart pooled 93 randomised trials involving more than 5,000 adults. On average, endurance, dynamic resistance and isometric resistance training each lowered resting blood pressure, while combined programmes lowered only the bottom (diastolic) number. After endurance training, the fall was larger in groups who started with high blood pressure than in groups with normal readings. The isometric results came from only a handful of studies, and averages can't predict your own response. If you have high blood pressure or a heart condition, check with your clinician before starting a strenuous programme.

Taking readings you can trust

Start with your monitor's instructions and any routine your care team has given you. The NHLBI's high blood pressure pages recommend a check at least once a year, plus regular home monitoring. Its guidance on measuring blood pressure covers the basics:

Use an approved home device with a cuff that fits your arm.
Prepare. Avoid exercise, coffee and smoking for 30 minutes beforehand, and go to the toilet first.
Rest first. Sit for at least five minutes with your feet flat on the floor. Stay quiet while you rest and while the cuff inflates.
Position your arm. Keep it bare, resting on a table at about the height of your heart.
Be consistent. Measure at similar times of day and record both numbers every time. The NHS blood pressure test page describes taking a reading, waiting a minute and taking another, usually morning and evening, for as many days as your doctor or nurse asks.

To get your readings into Apple Health, follow our guide to using blood pressure readings in My Bio Age.

How My Bio Age uses your readings

My Bio Age reads systolic and diastolic readings from Apple Health, with your permission. It does not measure blood pressure, so the numbers need to come from a separate cuff monitor whose app shares with Health, or from readings you add to Health yourself. Each day's readings are averaged into one daily value.

The dashboard card. A Blood Pressure (Systolic) card appears once readings exist. It usually shows the last complete week's average as systolic over diastolic in mmHg. If you didn't measure that week, it shows your most recent reading instead, sometimes as the top number alone. The change in the top (systolic) number from the week before is shown in a neutral colour rather than green or red, because whether a change is welcome depends on your starting point.
The detail view. Tap the card to see weekly averages charted over up to 24 weeks, plus the high, average and low of those weekly values for each number.
The weekly MyBioAge Index™. When readings are available, systolic and diastolic become two optional inputs. Each complete Monday-to-Sunday week's average is compared with reference values for your age and sex, and a week with readings on fewer than five days counts with less confidence. If you miss a week, a reading from the week before can still count, with less confidence. Without any recent readings, the Index uses its other inputs. If you've turned on pregnancy mode, blood pressure carries less weight in the Index, because readings naturally vary during pregnancy. This only changes the Index calculation; keep to the blood pressure checks your midwife or antenatal team recommends.

In the Index, lower readings count towards a younger result, but only down to the lowest reference value for your age and sex. That doesn't make very low readings a goal. The NHS notes that low blood pressure can cause dizziness or fainting, so if low readings come with symptoms like these, talk to your clinician.

None of this is a diagnosis or a treatment target. Rely on your clinician to interpret your readings.

Related signals to review

Resting heart rate, activity and sleep don't measure blood pressure, but they can help you see whether the habits above are sticking.

Resting heart rate is best read as a trend. Learn how to read your resting heart rate.
Active energy reflects how much you move through the day. See what active energy measures and simple ways to add everyday movement.
Sleep duration shows whether you protect enough time for rest. Read how Apple Watch tracks sleep duration and our practical sleep habits guide.

All three are inputs to the weekly Index as well. How Apple Health metrics become the MyBioAge Index™ explains how they fit together.

Putting it together

Steady habits do the work, and careful readings show how they are going. Share your log at appointments and ask how often to measure.

To review the blood pressure readings you have saved in Apple Health alongside your other trends, download My Bio Age free on the App Store. The iPhone app is completely free, with no in-app purchases, subscription or account required. Your health data stays private on your iPhone; you still need a separate blood pressure monitor to take the readings.

Very high readings need a different response. The NHLBI treats a top number above 180 or a bottom number above 120 as dangerously high, and advises contacting your doctor or care team straight away, even if you feel well. The WHO adds that very high blood pressure can come with symptoms such as a severe headache, chest pain, dizziness or difficulty breathing, and advises seeking care immediately if they appear. If that happens, call emergency services (999 in the UK, 911 in the US). Don't wait to see whether the reading comes down or check an app first.

My Bio Age provides general wellness information, not medical advice. It does not measure blood pressure or diagnose any condition, and nothing in the app is a reason to start, stop or change a medication. Our Methods & Sources page explains the approach in more depth.