COROS Heart Rate Monitor : The End Of ECG?

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Timestamps:
00:00 Intro
00:29 Review Setup
00:56 Most Important Specs
01:52 Test Setup
02:40 Test 1: First 3 Bike Rides
04:34 Test 2: Daytime Heart Rate
06:38 Test 3: Cycling Indoors Session 1
08:21 Test 4: Weight Lifting Session 1
09:44 Test 5: Cycling Indoors Session 2
10:08 Overview 1: Cycling Indoors
11:22 Test 6: Weight Lifting Session 2
11:47 Overview 2: Weight Lifting
12:22 Overview 3: Cycling Outside
12:55 Final Verdict
The HRM is COROS’ answer to ECG chest straps, you know, those straps you wear around your chest that give the most accurate heart rate readings. You can wear the HRM on the arm instead of the wrist, making it quick to put on. COROS says that their HRM is much more comfortable and easy to use, but has accuracy close to that of a chest strap. We will of course be testing if that is true. The HRM has built-in wear detection, which means it automatically powers on and off based on when it is worn, and the specs say it has a range of up to 120 meters, with 38 hours of full operation or 80 days of standby on a single charge. It releases today in the US and China, and in September in the rest of the world. The price of the HRM will be set at 79 US dollars at launch, and the closest device out there at the moment is the Polar Verity Sense, which can be worn in a similar manner. However, I found the Verity Sense to be OK, but not great, so let’s get to the actual testing, and check if the COROS HRM is better. To test the heart rate performance, we will compare it to the Polar H10 ECG chest strap, which has been used in several scientific studies, and can generally record my heart rate very accurately. I’ll start by testing the performance of the COROS HRM whilst cycling outside, and during the testing I’ll be wearing the HRM on my biceps. By the way, COROS sent me this device, but they did not sponsor this video, and they did not get to see or influence the content of this video.
So, what is my final verdict on the COROS HRM? Well, it’s not bad, and it might be exactly what some people would want, but it is not a replacement for an ECG chest strap just yet. It is amongst the best devices for cycling outside, which is really impressive, since most watches struggle a lot there. During cycling indoors it was also pretty good, though I was surprised it showed some minor artifacts. However, it is just not good enough during weightlifting, at least on me.

[@georgemarkets1]

Please review the Galaxy Watch 6 next! 🙏

[@TheQuantifiedScientist]

Yes, I ordered a bunch of them, let's see how they do!

[@georgemarkets1]

@@TheQuantifiedScientist you're the best!!

[@edismehmedali4666]

Unfortunately from the photos it looks like it’s the same sensor from the 5 series, which is a disappointment

[@privxete4089]

@@TheQuantifiedScientist And galaxy watch 5? But after the Update ofcourse, because they say the updated the sleep, i think.

[@hermanmusimbi4337]

​@@edismehmedali4666 the issues could be software based.

[@peterkornos8749]

You are amazing. Perfect footage for everyone, who needs to have precise and complete information. Thank you, Rob.

[@rramirez3555]

So good to see the behind scenes... Very useful as ever!!

[@Windsurfingaddict]

Thank you for all the time and effort you put in to bring us this information 😎😎

[@rostpa]

During the long runs and hot days I often get rush from the chest strap. I’m happy I was able to join the testing phase and have to say this HRM works well. The comfort is great, even after 14h of activity I didn’t feel it at all. And I was amazed how good the optical sensor can work if you place it on the upper arm. We were able to compare data from watch, chest strap and HR31 and even when watch OHR failed to show correct data, HR31 was identical with chest strap.

[@joseverdu2647]

Me too 🔝

[@eddiebaby22]

Best reviews on the tube! I'm wanting a slim affordable (cheaper) watch that does it all. So far I'm struggling, but it'll be on the strength of one of your reviews when I finally do find one 👍

[@aunttiasbackyard5028]

I have really been enjoying your videos. I've been checking them out as I prepare to make some purchases. I notice that you regularly warn people that different variables including skin color could effect results. Could you do a video showing the difference in effective sleep and heart rate tracking for dark skinned people as compared to lighter skinned people? Thanks for the detail you provide.

[@pauloeducardoso]

Dear Rob, thank you for the useful info. Because you are using R programming (ggplot) for data analysis, I'd suggest adding to correlation plots a colour gradient linked to a time var (at least start, middle, and end). This would increase legibility and better understand the differences between sensors.

[@neil1974uk]

Great video Rob just wondering if you've looked at the Coros Pace 2? I've got both it and a Garmin Epix 2 gen 2 watch. With the Garmin I've found that using a chest strap is must, especially during intervals or when it's cold. It will either drop out entirely or shoot up and this can affect the training and recovery scores. The Coros pace 2 however I've found to be flawless, for me it tracks almost perfectly with my Polar H10.

[@cusebike5391]

I have a few years of experience with the Polar H10 & both Polar & Garmin chest straps. I only use the H10 for cycling, both indoor & out. For the past several months I have included the Apple watch SE in this testing. The H10 & the SE match up quite reliably for average HR. If there is a difference, it's no more than 1or 2 bpm. They both line up quite well with the chest straps. I've always used the chest straps for weight lifting but now use the SE almost exclusively. Again, the variation between the two wasn't enough to warrant the continued use of the chest strap. I'm 188 cm & approx. 75kg. So obviously I'm a bit on the thin side and also light skinned. Your mileage may vary.

[@TheQuantifiedScientist]

Thanks for sharing! That generally lines up with my observations 🙂

[@edismehmedali4666]

Can confirm, I’ve never had my apple watch ultra be off by more than 3 bpm compared to my h10, during several cycling and running workouts

[@rafikstu7236]

Do you sweat a lot ? Cuz its an optical sensor ,or its just as good even when sweating ?

[@jaxlittle4152]

Love ur videos Rob!🎉🎉

[@benbeeler2394]

Thanks for doing this! Good to know it’s not as good, but not terrible

[@pjoliver182]

Hi Rob. Amazing work; big fan here! Have you tried other smart rings like the Circula ring?

[@robertjleter]

Huawei watch 4 pro please, especially the comparison of sleep monitoring with apple watch

[@qwertyCandy]

Seconding - that's the watch I'm interested in the most.

[@mostlyindica]

Wow just perfect timing, thanks.

[@TheQuantifiedScientist]

Thanks so much!

[@superpower48]

@@TheQuantifiedScientist Would you be interested in trying the pokemon go plus+ for sleep tracking pokemon has a wide reach and could get a lot of data for sleep tracking would be amazing if the data was accurate

[@alexest2665]

Can't wait for the Galaxy Watch 6 review! Rob's reviews are always top notch!

[@Feldmanphysicaltherapy]

Been testing this for a bit now, and comparing to my H10 and this thing is right there. Past optical bands for me always seemed to be slightly delayed, but this has been great!

[@FH-lx9zn]

Can you just connect it to a iphone or do you need another device?

[@NYBobmbers7]

@@FH-lx9zn it’s Bluetooth so if you have an app to read the HR you can just connect to phone directly

[@ygln1997]

I await your review of the Casio DW-H5600 + Garmin Instinct 2X. You do very good analysis 👍

[@forgetmyname5166]

Waiting for your review Omg

[@KasraK]

You should do a review on the Frontier X2 heart monitor as its considered one of the best on the market. Would love to see it withstand some of your thorough testing! ❤

[@peerpaschedag404]

great review!

[@TheQuantifiedScientist]

Happy to hear that!

[@lowrights33]

Thanks for evaluating for weightlifting. That is my use case. Chest strap traps a lot of sweat so was looking for an alternative. Will keep looking 🙂

[@mp3311]

Great review! I loved the analysis! Also, would the hr monitor be suitable for running? Would I have some accurate results?

[@chrisocampo1837]

Thanks for this! Please also do a review of the cheaper Coospo chest and armband sensors.

[@SliceOfSampai]

Just found your channel and been loving your content! Just gotta ask: why are you wearing a Huel shirt? I just ordered my first order of ready-made drinks and got a shirt from them so I thought it was funny seeing it in your videos lol

[@christiancross653]

Awesome review as always! Please check out 8 sleep even tho it’s so expensive

[@TheQuantifiedScientist]

Already did a few months back 😊: kzbin.info/www/bejne/rYi4o4aBrayGY5I

[@EnigmaPhi23]

Thanks!

[@arnolfinilmf]

Can't wait for Huawei watch 4!

[@pablo9595]

Waiting for the casio DW-H5600... Nice video!

[@mikesmith42069]

Since you've already done this COROS and also the Polar Verity Sense, could you eventually do the Scosche Rhythm24? It's half the cost of the Polar Verity Sense, and its heart tracking seems to be nearly on-par with the Polar H10 chest strap. It's an optical sensor like the COROS and Polar VS, but somehow there appears to be zero lag in HR detection like you see with other optical HR sensors. The results are instant like with a chest strap.

[@mime454]

Rob getting jacked. Looking great man.

[@chriskim7123]

oh as a first visitor of this channel, my heart dropped a little when you showed your abs 🤯 haha !

[@Glockers76]

Have you completed the same for Schosche? Excellent review

[@Rajjjj19929]

That’s very thorough indeed, still it would have been nice to see it tested on running since I believe it’s what it was primarily conceived to track

[@Varpie]

I wonder if the typical late increase in heart rate could be related to how heart rate is measured. Since the heart rate is in beats per minute, I suppose it is computed doing something like (b/n)*60, where b is the number of beats over n seconds. What is the typical n? Having it too low would mean missing a beat varies the value a lot, bit having it too high makes it slower to keep up with sudden changes. It would be interesting if it was possible to get the "raw" data of when the beats were detected, and compare differente ways to compute the heart rate.

[@caiobomani]

Good stuff. I wonder if you'd evaluate Garmin's HRM Pro +. Not sure if I should be purchasing HRM Pro + or Polar H10 as a Garmin watch user.

[@TheQuantifiedScientist]

Yes, that would be cool. Slightly tricky to test, but I'll do my best!

[@nesjka4606]

Hi, are you going to review the Choros Apex pro watch oneday, seems like a really good watch!

[@AyaNeoJay]

thank you for your review! question, is there any heart rate monitor that can be use with multiple user? I want to use only one heart rate monitor to my patients. thanks

[@tommyle628]

you only tested indoors, the problem is the OHR gets very noisy with its reading while outside, on sweaty arms in hot & humid environment. I should wait for more test scenarios to decide whether to trust your data.

[@razzjel]

Any upcoming reviews of "smart rings" like ultrahuman or ringconn to compare them to oura? 👍

[@immanuelkuhrt8508]

Have you tried the Polar H10 with exercises like bench press. I find that my Garmin HRM-Pro plus works poorly at this and other movements, where a gap can be created between the puck and my chest. It also misses beats when I bend over with my upper body and create a similar gap.

[@aanchaallllllll]

0:00: 📊 This is a review of the Chorus heart rate monitor, comparing its performance to a chest strap. 2:47: 🚴‍♂ The chorus hardware monitor performs well in tracking heart rate during outdoor cycling. 4:23: :chart_with_upwards_trend: The chorus hardware monitor generally agrees well with the polar h10 ECG Jazz strap in measuring heart rate, with a correlation of 0.95. 6:32: 😕 The performance of the course hardware monitor is compared to other devices for different exercises. 8:49: 📊 The performance of the chorus heart rate monitor during weightlifting and spinning sessions was analyzed. 11:04: ⭐ The Chorus HRM performs well for cycling outdoors, but struggles during weightlifting. 13:21: 📉 The Chorus HRM may not accurately track heart rate for weightlifters and could be affected by different skin tones or tattoos. Recap by Tammy AI

[@arneverlinden8416]

Still waiting for the ticwatch pro 5 review, love your content tho💪

[@arnolfinilmf]

Any chance of a long term review of Huawei Watch GT 3? (Lov you job man)

[@michamaecki5678]

Please compare all the available smartbands. I don't really want to buy a smartwatch but I want something to count my calories and track my heartrate when running and weightlifting.

[@gpee9029]

I already have a Garmin Forerunner 245 M. Wondering if I should get this or upgrade my watch to the Coros Pace 3 for more accurate heart rate readings while running? Which one would you recommend?

[@styx00ps41]

Review Huawei Watch 4 pleaseee :p

[@teakesj]

Thank you for the very informative videos. One question though: I'm trying to find an armstrap heart rate monitor that sends it's signal also at 5.3 Khz. Sofar I didn't succeed. Do you know of any?

[@koseorhun]

I wonder if doing a simple r2 isn't enough for correlation when most of the outliers end up isolated around patterns of good overlap. Is there any way of showing the chronological distribution of the outliers (half beat red line ones and/ or over estimations)

[@LuizOliveira-er6ly]

Probabily the distribution of the difference em measurements, with skewness, IQR and median would show how different and the direction of difference as well!

[@koseorhun]

@LuizOliveira-er6ly I should have been clearer, I don't mean the distribution of the error or difference. In contrast to other types of variables, error in heart rate estimation has time domain components (number of heart rates not detected accurately in succession). We need something like a sparsity analysis but that can quantify outliers instead of fully missing data.

[@TheQuantifiedScientist]

Yeah, definitely something I've thought about. I mostly did not do it because I want to keep it somewhat understandable for people 🙂. But, I;ve been thinking about extra metrics to include. Thanks for the suggestions!

[@joseverdu2647]

One suggestion is to use the Bland-Altman graphic between chest strap and Coros HR monitor. I was very impressed when I was testing in real time, viewing 3 readings (watch, chest and HR31) very accurate. When I experienced out data was with the H10, likely, due to a movement on the chest. But Coros have now lots of data to improve firmwares 😉

[@destinamos]

Would love to see a review on one of the G-Shock smart watches. The heart rate tracking is done by Polar, but still wondering if they're worth it.

[@LGTVQHD]

They messed up in G-Shock

[@IPMan-me6lo]

Have you had a Test on Shanren Beat 20? It is a chest belt with ECG functionality.

[@giridhranpalani3139]

Cant wait for your Galaxy watch 6 review!

[@larryseibold4287]

How do you get data (CSV) off of devices like the H10 to a windows PC (excel) without security/privacy issues associated with a cloud based account system? I just want want to see my accurate HR data after a training session, without being tracked. If i want to view it in real time, i will use a watch of a biking computer.

[@yildiraykomurcu]

Are Muse S headband and Ultrahuman ring reviews on the way too Rob ?

[@KwyjiboVanDeKamp]

Ich frage mich, ob eine Smartwatch getragen am Oberarm ähnliche Resultate erzeugen würde? Hast du Erfahrungen damit, ob eine Uhr die Herzfrequenz besser misst, wenn sie an Stellen mit großen Venen getragen wird? Oder spielt das keine große Rolle?

[@TheSambev]

Any plans to re-review whoop and Oura after plenty of firmware updates in the last year?

[@niceone1456]

I just hope one day Apple Watch can broadcast its heart rate so I can use it with my Garmin edge, such an accurate hr device😢 I can only opt in for a Garmin watch, which isn’t really good seeing your testing with cycling outdoor, and my experiences as well, huge delay when my heart rate goes up and down.

[@peakproofuk]

I'm surprised there's not more half/double errors when looking for rhythm in hr data - I guess algorithms sort it out a lot

[@anastasialebedeva2873]

When you have a test of the new watch: huawei watch 4 pro and samsung galaxy watch 6?

[@antigen6870]

I wonder what is the use of a HR strap, if someone is using a strap which can be anoying a chest strap will be better anyway. The optical HR is cool on the wrist because it comes with the watch, using a stra just for optical HR feels pointless.

[@costafilh0]

Can't wait for the new Galaxy Watch 6 tests. It would be nice to not have to buy an iPhone just to get a good health tracker.

[@rizki_tiron]

Hope you review galaxy 6 and 6 classic soon

[@SantQiu]

It'd be great if you can test other smart rings like Circular Ring, Ultrahuman, RingConn, Movano. The ring form factor seems to be catching on. Thanks

[@rainerrain9689]

Hi, which of these rings DON'T require a subscription to access my very own data ?

[@CoachMax-EP]

@@rainerrain9689 I own the ringconn and it doesn't need a subscription... At least for now. It's the main reason I backed it when it was on kickstarter, I was annoyed at oura charging a high monthly price when the ring upfront isn't cheap.

[@benbeeler2394]

@@rainerrain9689ultrahuman

[@iamsotiredofliving]

​@@rainerrain9689did you find out?

[@scriptosaurusrex]

​@@rainerrain9689ultrahuman

[@harshullaiwala]

I would love to get your review of the the new CASIO DWH5600 .. especially interested in the HRM functions.

[@RAGINGXBULL2]

Please review the Ultrahuman ring air, I can't decide between that or a Oura Ring

[@AnimeAlif]

Please do a mi band 8 vs Huawei band 8 comparison after mi band gets a global launch. I'm really confused which one to get.

[@maguillarama]

Looking forward for the Galaxy watch 6 review 😁

[@Mokasdar09sushrut]

Hi, I read somewhere that Polar H10 can also do sleep tracking. I was wondering how is the sleep tracking of Polar H10? Didn't find any video on that. Any insights would be appreciated.

[@TheQuantifiedScientist]

Hi! Some companies like Nukkuua are creating software for this 🙂

[@paulmeyer9677]

You can easily record RR data from the H10 with the Sensor Logger app and analyse it with Kubios HRV. Using spectral and detrended fluctuation analysis the sleep phases can be differentiated (LF/HF and Hurst-like exponents).

[@cassio499]

What if you place the this HRM in the inner biceps? maybe there is less moviment on this part of the arm

[@juan2luna]

Hi, do you plan to test it in running?

[@merpinallday]

What if you wore it on your forearm for weight lifting instead?

[@ManmeetSingh201]

Hi Rob, I have a question, might sound silly but why is it called ECG strap? Its only an HR monitor, right?

[@TheQuantifiedScientist]

Hi! Not silly 🙃. It’s about the technology used to measure heart rate. Watches use PPG, which is based on measuring the amount of light reflected back from the skin, and this is generally quite noisy. ECG uses the electric signals of the heart directly to get your heart rate. It’s the same technology type the doctor would use to study your heart beats and rhythms .

[@ManmeetSingh201]

@@TheQuantifiedScientist really appreciate your answer! Thanks man!

[@wasatchwizard4770]

Is that Visual Studio I see there? Is it C#?

[@usaidnagori4167]

Please review Redmi Watch 3 Active next!

[@TrueNaturalBB]

Why are Apple watches so much better than most other brands? Is that mainly a hardware or rather a software issue?

[@rawrss]

0:14 Get your tickets to *Rob's gun show* 💪

[@BS-zy3tn]

Hair looking thick and luscious 👍

[@SimRacingIsNotGame]

Can you do a review to Coros Apex 2 !?

[@sergeyovchinnikov1804]

How do you plan to show that any device can beat H10 if by definition H10 is 100% accurate in your tests? Having at least one more device would add confidence to the picture. I understand that it is used to be the industry standard but for me H10 frequently gives abnormal values when running. Do not have any problems though when cycling indoor or outdoor.

[@northlee4545]

But if my sports watch heart rate is accurate enough, why would I need a heart rate monitor that doesn't support running dynamics data?

[@camimzbunje97]

Dexter huawei watch 4 pro

[@thechaoscoefficient]

The strap comfort is a joke. I bought this and requested a return a few minutes after getting it from Amazon. The sensor may or may not be good. That is entirely irrelevant if it hurts to wear and I will never wear it. My biceps are small compared to body builders and weightlifting buffs. It will not open up large enough to fit comfortably. It is painful to wear. Your arms look slightly bigger than mine so I don't know how it is not digging in or pinching your arm. They label the strap as size medium when in reality it's the only size available.

[@oscarsg1972]

Could you review the huawei watch 4?

[@kumartamil6]

🎯 Key Takeaways for quick navigation: 00:00 *🏃‍♂️ The COROS heart rate monitor is an arm-worn alternative to traditional chest strap monitors, promising comfort and accuracy comparable to ECG readings.* 03:21 *📊 Initial testing during outdoor cycling shows good correlation (0.9) with ECG chest strap readings, with occasional dips in accuracy.* 08:28 *🚴‍♂️ Indoor cycling results demonstrate consistent performance with a correlation of 0.9, though occasional discrepancies in heart rate detection occur.* 11:30 *🏋️‍♂️ Weightlifting sessions reveal the monitor's limitations, struggling to accurately track heart rate peaks during intense arm exercises.* 13:12 *⚖️ Overall, the COROS HRM performs well for outdoor cycling and moderate indoor activities but may not be suitable for intense weightlifting due to accuracy issues.* Made with HARPA AI

[@eslmatt811]

Have you ever compared two polar chest straps? I am curious how close they would line up.

[@yildiraykomurcu]

He did. Just search the old videos.

[@TheQuantifiedScientist]

Yes, I have. It does mean one is somewhat suboptimally positioned, and I need to make sure they don't slide over eachother. They generally did very well, though I'd like to redo the testing

[@chahatgupta4832]

Can you review amazfit gts 4 mini please

[@coolman6719]

But what about amazon halo view

[@yz113]

Pretty good for running I assume

[@codak29]

The Coros costs the nearly the same as the H10 and isn't a watch. I don't understand the use case outside people who don't want to wear a chest strap.

[@MattCooperKay]

Bingo

[@njsfer]

How does it compare to Polar Verity Sense? Also, it would be interesting to test it in different parts of the arm, I personally have the Verity Sense from Polar and it works great on the inside of my bicep, close to my armpit, where there's never much tension, not even while lifting.

[@Lenardb01]

10:56 12:03 Verity is in the list... doing better than the Coros.

[@Decks5757]

Does Coros measure HRV?

[@georgibg]

I've had nothing but issues with the Polar H10 and I don't consider it as the gold standard for heart rate measurement by any stretch of the imagination. I've had frequent heart rate drops which last quite some time and skew my entire workout and zone distribution. This has been much less infrequent with the Garmin HRM Pro and almost never happens with the Polar Verity Sense optical HRM. I'm willing to try out the Coros HRM as I'm anyway training for ultramarathons and I rarely even go in zone 3.

[@anthonycraig274]

Polar HRM or Apple Watch, nothing else isn’t even on my radar but I am waiting for you to say, X is the best I’ve tested.

[@TingkuPodder]

Galaxy watch 6 and redmi watch 3 test please

[@ultrarunnerEST]

Since it offers 38 hours battery only It's not even an alternative for many. Accuracy isn't better either.

[@dwikisanjaya9737]

Huawei watch 4 please

[@racvv]

You must try the new Huawei watches. There's a whole new generation and we don't know how precise are they

[@BurOnOz]

You can like to review ayo bt + boost

[@hanifyahaya2759]

I'm waiting Huawei Watch 4

[@MiguelSolorzano]

Try Huawei Ultimate