Oppo is set to launch FatMax, a personalised fat-burn training feature on its Watch S2, harnessing live data and machine learning to optimise exercise effectiveness beyond traditional heart-rate zones, marking a step towards more tailored fitness monitoring.
OPPO is preparing a new fitness feature called FatMax that it says will make fat-burn training more personalised than the standard heart-rate zone formulas commonly used on smartwatches. The company is positioning the tool as a more precise way to estimate the point at which exercise is most effective for fat oxidation, rather than relying on a broad age-based calculation. According to the launch material reported from Indonesia, FatMax is due to arrive with the OPPO Watch S2 in September.
The main distinction, OPPO says, is that FatMax does not depend only on age. Instead, it uses live data from the watch and factors in height, weight, age, sex and the user’s recorded fitness level to calculate an ideal heart-rate range in real time. The system is also designed to learn from day-to-day activity, with the algorithm refining its estimates over time as it gathers more information from the wearer.
During exercise, the watch is expected to show an estimated fat-burn figure live, which OPPO says is meant to make the process easier to understand for everyday users. The company demonstrated the feature at a running event in Shenzhen, suggesting it is being pitched as a practical training tool rather than a laboratory measure.
FatMax is not the only running-focused addition. OPPO is also introducing Smart Track, a feature developed with Beijing Sport University. That system automatically records running speed and duration, then produces post-workout analysis and training advice. The broader direction fits with recent OPPO wearables, including the Watch S and Watch X3, both of which offered dedicated fat-burning run modes alongside more detailed metrics such as heart rate, calorie burn and running posture analysis.
The company has steadily expanded its health and sports software as it competes in a crowded smartwatch market. Earlier Watch Free models already included heart-rate zones and a fat-burning run programme, while the Watch S added over 100 workout modes and more advanced running analytics. FatMax appears to move that approach further by tying workout guidance more closely to personal physiology, rather than to a one-size-fits-all formula.
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