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Samsung Galaxy Watch 4 could get a body composition monitor
June 13, 2025
Smartwatcheshave bolted on several new health sensors in recent years. Some wearables can now measure stress, skin temperature, andheart health, while SpO2 sensors have become commonplace. Now, Samsung could add yet another new sensor to theGalaxy Watch 4.
According toMax Weinbach, the Samsung Galaxy Watch 4 will include a bioelectrical impedance analysis (BIA) sensor, a feature commonly found on smart scales.
How does BIA work, and what does it do?
BIA is a method to measure the composition — or the percentage of fat to muscle and other tissue — of the human body. The sensor reads the impedance, or disruption, of a low voltage current sent through the body. BIA uses this data to estimate whether a wearer is too lean or obese as bone, muscle, fat, and other tissue have different electrical resistance qualities.
PerDoylestown Health, current BIA sensors usually employ two electrodes positioned on a patient’s opposite hand and foot. Samsung may get around this by asking the wearer to touch a part of the watch with their other hand, completing the circuit. A patent filed in 2019 (h/tPatently Apple) suggests that Samsung will likely employ this solution.
BIA readings on a wearable could be a valuable addition to those wanting to build muscle, monitor their general health, or burn fat. It would also sync effectively with other performance metrics, likeVO2 Max. While theGalaxy Watch 3wasn’t the most effective fitness tracking wearable, it seems that Samsung intends to improve this facet of its wearables.
Samsung is expected to unveil the Galaxy Watch 4 and Galaxy Watch 4 Active onJune 28. So we’ll get a confirmation of the device’s fitness smarts in a few days.
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