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Apple just patented a sweaty trick every fitness watch could benefit from
Most fitness apps have you log your hydration, but they can only guess how much water you lose during exercise. Apple could change that.
(Image credit: USPTO / Apple)During a workout, the patent suggests, users could also see an "instantaneous" sweat rate from the last 15–30 seconds, which might appear as a real-time metric on the watch. To give you the most accurate data, the Apple Watch would take external factors like ambient temperature and humidity into account by checking your GPS location against current weather reports. Even if the cEDA sensor in the Fitbit Sense 2 or Pixel Watch 2 could work for sweat loss measurements, it appears Apple has the idea reserved for itself.
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