Wearable tech that can help take care of your heart

Every heartbeat matters. Yet amid the rush of everyday life, people often pay little attention to their heart health until a problem becomes difficult to ignore.

As the world marks World Heart Day today (29 September), wearable technology is giving people a simple way to keep a closer eye on some of the factors linked to cardiovascular health.

Smartwatches, fitness bands and other wearable devices have evolved far beyond counting steps. Many can now monitor heart rate, track physical activity and sleep, and, in some cases, record an electrocardiogram (ECG) or alert users to an irregular heart rhythm.

Keeping track of heart rate

Heart-rate monitoring is one of the most common features available on modern smartwatches and fitness trackers. Using optical sensors, these devices estimate how fast the heart is beating throughout the day and during exercise.

Tracking heart rate can help users understand how their bodies respond to physical activity. A sudden or unusually high or low reading, particularly when accompanied by symptoms such as chest discomfort, dizziness or shortness of breath, may be a reason to seek medical advice.

However, readings from wearable devices are estimates and can be affected by movement, loose-fitting straps, skin contact and other factors.

ECG and irregular heart rhythms

Some advanced smartwatches have electrical sensors that can record a single-lead ECG. This can provide information about the heart's electrical activity and may help identify signs of an irregular rhythm such as atrial fibrillation, commonly known as AFib.

For people who experience occasional palpitations or an irregular heartbeat, having an ECG feature readily available can provide information that may be useful to share with a doctor.

But a smartwatch cannot replace a clinical ECG or medical examination. An alert should be treated as a signal to seek professional advice, not as a diagnosis.

More movement, better habits

Wearables can also encourage one of the simplest ways to support heart health: staying physically active.

By counting daily steps, measuring exercise time, and reminding users to move after long periods of inactivity, fitness trackers can make people more aware of how much they move. Some devices also estimate calories burned and monitor exercise intensity, helping users establish more consistent routines.

Sleep tracking is another increasingly common feature. Poor sleep is associated with several cardiovascular risk factors, so monitoring sleep patterns may encourage users to take rest and recovery more seriously.

Can they measure blood pressure?

Blood-pressure monitoring is another area where wearable technology is developing rapidly. Some devices claim to estimate blood pressure without using a traditional inflatable cuff.

However, cuffless wearable blood-pressure technology still has limitations, and such readings should not automatically be considered equivalent to measurements taken using clinically validated equipment.

The same principle applies to other wearable measurements: they can help users observe trends, but they are not substitutes for doctors, clinical tests or prescribed treatment.

On World Heart Day, wearable technology offers a useful reminder that heart health begins with awareness. A smartwatch cannot prevent every heart problem, but it can encourage people to move more, understand their bodies and notice changes that may warrant medical attention.

Ultimately, the most important feature of any wearable device is not the number displayed on its screen, but whether it encourages people to take better care of their heart.