Oppo has introduced a new feature called FatMax that personalizes the fat-burning heart rate zone for each user.
Instead of using a generic formula, FatMax calculates your own range based on your height, weight, age, gender, and exercise level.
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The feature runs this data through Oppo's health algorithm to determine your specific fat-burning zone.
As you wear the watch longer, it adjusts and refines that number based on your actual activity.
How FatMax Works
Most watches use a basic formula: 220 minus your age, then 60 to 70 percent of that number.
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That approach doesn't account for individual differences, so two people of the same age can have very different fitness levels.
With FatMax, you can see your fat-burning grams update in real time during exercise.
Oppo demonstrated the feature at an event in Shenzhen called the “Burning Party,” where attendees tried it while jogging.
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Li Sheng, who leads Oppo's health product business, said the goal is to make fat burning something you can actually track.
FatMax will launch alongside the Oppo Watch S2 in September.
It follows other recent health-focused updates, including the Oppo Watch X3's blood pressure and ECG tracking, and the Oppo Watch S's AI-based coaching tools.
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Oppo also announced a “Smart Track” feature, developed with Beijing Sport University, which automatically records pace and time as you run and provides guidance afterward.
