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Timestamps:
00:00 Intro
01:34 Heart Rate Test 1: Spinning
06:01 Heart Rate Test 2: Running
06:40 Heart Rate Test 3: Cycling
09:42 Heart Rate Test 4: Weight Lifting
11:38 Heart Rate Test Conclusions
12:16 Sleep Stage Test 1: Sleep Stages
17:58 Sleep Stage Test 2: Overview
19:34 GPS Tracking Test
22:49 Conclusions & Recommendations

In this review, we'll be assessing the health and sports tracking capabilities of the Amazfit GTR4 using scientific and systematic methods. If you're someone who values your health and fitness, and you want to find the best smartwatch or fitness tracker, then this video is definitely for you. I've collected data for 27 workouts, 11 nights of sleep and 13 GPS tracks using the Amazfit GTR4, and we're going to compare the results to reference devices to see how well the watch actually performs. I'll be sharing all the data with you so that you can make an informed decision about whether this is the right smartwatch for you. So, whether you're an athlete, a fitness enthusiast or just someone who wants to stay on top of their health, you won't want to miss this review. So sit back, relax and let's get started!

The Amazfit GTR4 has been one of the most requested watches for me to test, so let’s get to it. As you know, I don’t like listing the specs of watches, since that has been covered in many reviews and can also be found on Amazfit’s website. I will be focussing on the actual data instead, and finding out if Amazfit was able to improve their product. In past videos I’ve shown that while Amazfit makes some of the most beautiful smartwatches, their health tracking features have been amongst the worst out there. Their heart rate tracking and sleep tracking have been especially terrible, but the new BioTracker 4.0 Health Data Sensor of the Amazfit GTR4 might have improved this. So, let’s take a look, and I want to start off with the heart rate tracking performance of the Amazfit GTR 4.

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