Amazfit Cheetah 2 Pro Scientific Review
In a Nutshell
The Amazfit Cheetah 2 Pro delivers excellent GPS tracking with a 90/100 score and reliable heart rate monitoring during indoor cycling (0.98 correlation), weightlifting (0.95), and running, though outdoor cycling shows only acceptable performance (0.84 correlation). Sleep stage tracking scores 65/100 with typical accuracy (74% deep sleep, 60-61% light/REM), placing it in the second-to-third tier of current devices. The watch's strongest value proposition is its GPS performance combined with mapping features at $450, making it a strong alternative to much more expensive Garmin devices for runners and trail runners who pair it with an external heart rate chest strap.
These notes were generated by AI and may contain inaccuracies.
With a launch price of $450, the Amazfit Cheetah 2 Pro isn't the cheapest device from the brand but offers features typically found at higher price points from other manufacturers. The mapping functionalities match what would cost several hundred dollars more on Garmin devices. The review focuses on data analysis of the Cheetah 2 Pro as a running watch, comparing it to established brands like Garmin. GPS tracking performance was particularly impressive during testing.
The reviewer is Rob, a post-doctoral scientist specializing in biological data analysis. Testing methodology involves comparing device readings against reference standards: ECG chest straps for heart rate, Zmax EEG headband for sleep stages, and consistent route cycling/running for GPS accuracy assessment.
Indoor cycling (spinning) showed excellent performance with a correlation of 0.98 against ECG reference measurements. Points clustered closely around the ideal blue line, indicating reliable heart rate tracking. This represents the easiest exercise type for optical heart rate sensors.
Individual session analysis revealed minor issues in the first interval where the device detected slightly low heart rates, but subsequent sessions showed near-perfect agreement. The device occasionally struggled during the first interval but performed close to perfectly in the second and third sessions.
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