If you’ve exercised while watching a fitness tracker, you’ve probably seen it tell you to stay in a fat-burning zone. Oppo is changing how that zone gets calculated with a new mode called FatMax. The feature calculates your own fat-burning heart rate range instead of giving everyone the same generic range.
A fat-burning zone is a heart rate range where your body relies more on stored fat for energy, rather than burning through carbs first. Staying in that range during a workout is meant to make fat loss more efficient.
Most watches calculate your fat-burning zone with a basic formula: 220 minus your age, then 60 to 70 percent of that number. It’s an easy formula, but it doesn’t account for individual differences. Two people the same age can have very different fitness levels, so the same heart rate zone doesn’t make sense for both of them.
Oppo’s FatMax is making its debut in Oppo Watch S2
FatMax has its own new way of calculating this. It uses your height, weight, age, gender, and current exercise level, then runs the data through Oppo’s own health algorithm to determine your specific fat-burning zone. The longer you wear the watch, the more it adjusts and refines that number based on your actual activity.
Li Sheng, who leads Oppo’s health product business, said the goal is to make fat burning something you can actually track, rather than an abstract target. While exercising, you can see your fat-burning grams update in real time. Oppo demonstrated this at an event in Shenzhen called the “Burning Party,” where people tried the feature while jogging.
FatMax will launch alongside the Oppo Watch S2 in September. It follows other recent health-focused updates from the company, including the Oppo Watch X3’s blood pressure and ECG tracking and the Oppo Watch S’s AI-based coaching tools.
Alongside FatMax, Oppo also announced a “Smart Track” feature, built with Beijing Sport University. It automatically records pace and time as you run and provides guidance based on that data afterward.
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