To measure blood pressure more accurately

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Fitness trackers analyze all hand movements throughout the day, so the algorithm may mistakenly count some of them as steps. At the same time, if a person shuffles, limps, or simply moves slowly, the tracker may not register such movements.

Driving a car, working with a computer mouse, changing clothes, showering, and active gesticulation can cause the pedometer to give false readings.

Calorie counter
Devices from different manufacturers calculate calories burned in different ways . Some take into account activity and physical condition indicators, as well as a person's height, weight, age, and gender. Others work only on the basis of activity data - some take into account its type: running, walking, cycling, swimming.



The accuracy of calculating calories burned depends on the mathematical model used in the tracker - the more data it takes into account, the more likely the result. A study by scientists from Stanford University and the Swedish School of Sport and Health Sciences showed that the difference in the number of calories burned for 10 thousand steps can range from 400 to 800 kilocalories.

The accuracy of measurements also depends on taking into account the level of physical fitness, the quality of exercise, and body composition. Not all bracelets take these indicators into account.

Pressure measurement
Some devices use a pressure sensor to measure blood pressure . Others malta number data use a pulse rate sensor, which works on the basis of a pulse oximeter or photoplethysmogram.

A medical blood pressure monitor provides the most accurate readings . It measures pressure in the upper arm, where the arteries are deep under the skin, while a smartwatch measures it on the wrist. Blood pressure at the wrist is usually higher and more difficult to measure because the arteries are closer to the skin.
with a smartwatch, your arm and wrist should be at heart level. But even in this case, the readings of the bracelet will be less accurate than those of a blood pressure monitor. The error will increase if the skin on your wrist is covered with dust or sweat, and if you measure blood pressure while moving.

Altimeter
An altimeter, or altimeter, works by sensing atmospheric pressure. Atmospheric pressure is highest at the surface of the earth and decreases as you climb. To determine your altitude, an altimeter compares the new pressure reading to the previously known sea level.

A smartwatch with an altimeter needs to be calibrated almost daily to match a known reference altitude. The altitude reading may be inaccurate during airplane flights or after changes in atmospheric pressure.