Amazfit T-Rex Ultra 2 Heart Rate Retest: I Was Wrong!

Amazfit T-Rex Ultra 2 Heart Rate Retest: I Was Wrong! I retested the Amazfit T-Rex Ultra 2 heart rate sensor against the Polar H10 chest strap after multiple software updates, warmer weather, and more careful wrist placement. In my original review, the onboard optical HR sensor was one of the weaker parts of the watch — but this retest told a very different story. In this video, I compare the T-Rex Ultra 2 to the Polar H10 across running, Peloton rides, elliptical workouts with and without moving handles, and strength training. The results were excellent for running and stable cardio, surprisingly strong for Peloton and no-stick elliptical, but still mixed for lifting and poor with moving-handle elliptical work. If you’re considering the Amazfit T-Rex Ultra 2, Balance 3, Cheetah series, or other current Amazfit watches and care about heart rate accuracy, this retest may help you decide when the onboard HR sensor is good enough — and when you still need a chest strap or armband. Amazfit T-Rex Ultra 2 vs Polar H10 Heart rate accuracy retest Running HR accuracy Peloton / indoor cycling HR accuracy Elliptical HR accuracy Strength training HR accuracy When to use onboard HR vs chest strap Fair Use: In the rare instance I include someone else’s footage or sound it is covered in Fair Use for Documentary and Educational purposes with intention of driving commentary and allowing freedom of speech.