Amazfit GTR 4 : Scientific Review (beautiful but bad...)

🔴 General Amazon link*: https://geni.us/thequantifiedscientist 🔴 Amazfit GTR 4*: https://geni.us/Amazfit_GTR4 🟢 Instagram: https://www.instagram.com/quantified_scientist/ 🟠 Shorts: https://studio.youtube.com/channel/UCcpARGzXNaC62UQWns2dh2Q 🔵 Newsletter: www.robterhorst.com 🟡 Twitter: @QuantifiedRob * Affiliate (paid) links support the channel by earning me a commission on any sale, and it doesn't cost you any more! My opinions are completely my own, and this content is not sponsored. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 👇 $30 off any new WHOOP membership, affiliate* (paid) link, supports the channel!👇 https://join.whoop.com/QuantifiedScientist ($30 off any new WHOOP membership) ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 👇Amazon Affiliate* (paid) links. Supports the channel, doesn't cost you any more!👇 ▬▬▬▬▬▬▬▬▬▬BEST WATCHES▬▬▬▬▬▬▬▬▬▬ Whoop Strap 4.0: join.whoop.com/QuantifiedScientist ($30 off any new WHOOP membership) General Amazon link: https://geni.us/thequantifiedscientist Amazfit GTR 4*: https://geni.us/Amazfit_GTR4 Huawei Watch Fit 2: https://geni.us/HuaweiWatchFit2 Huawei Watch GT3 Pro: https://geni.us/thequantifiedscientist Huawei Watch GT Runner: https://geni.us/HuaweiWatchGtRunner Huawei Watch GT 3: https://geni.us/Huawei_Watch_GT3 Apple Watch Ultra: https://geni.us/AppleWatch_Ultra Apple Watch 8: https://geni.us/AppleWatchSeries8 Apple Watch 7 41 mm: https://geni.us/AppleWatch7_41 Apple Watch 7 45 mm: https://geni.us/AppleWatch7 Apple Watch 6: https://geni.us/0gNGeO Apple Watch SE: https://geni.us/Apple_Watch_SE_44 Samsung Galaxy Watch 5: https://geni.us/SamsungWatch5 Garmin Fenix 7: https://geni.us/Garmin_Fenix_7 Garmin Venu 2: https://geni.us/Garmin_Venu_2 Garmin Instinct 2: https://geni.us/Garmin_Instinct_2 Polar H10: https://geni.us/hnXc Polar OH1+: https://geni.us/D7bs5 Polar Verity Sense: https://geni.us/polarVeritySense ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 📸My Gear* (paid links, supports the channel and doesn’t cost you any more)📸 Camera body (main): https://geni.us/SonyA6600_body Camera lense (main): https://geni.us/SigmaContemporary Camera (B-roll): https://geni.us/CanonEosM50MarkII and https://geni.us/Sony_ZVE10 Light: https://geni.us/Godox_VL150 Softbox: https://geni.us/NiceFotoSoftbox Light stand: https://geni.us/WalimexLightstand ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 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.