Whoop Strap 4.0: Long-term Scientific Review (7 months!)

[@MysticMac000]

Your reviews on fitness trackers are the only ones worth watching. Accuracy is everything, so thank you for putting in the time to do this!

[@AustralianTakeOver]

he is a lord, need him on all smart devices for life.

[@TheQuantifiedScientist]

Wow! Thanks so much for this nice compliment 🙂

[@روح-د9ر]

Absolutely agree 100%

[@Paul-cy9ej]

Yes, thank you so much for doing these!

[@owenbeynon6170]

Brilliant thanks...But how do you afford all the kit??

[@ShervinShares]

production quality just keeps skyrocketing even higher!

[@TheQuantifiedScientist]

Thanks so much Shervin!

[@riverfuss]

Thanks! This was a great video. It was the first one of yours I’ve ever watched. You’re awesome!!

[@bodihearn]

The level of consistency and attention to detail this took on your part is amazing. The perfect amount of deep-dive info but streamlined so as to not be too time-consuming. You also explained things very concisely, thank you. Awesome video

[@kongkongball1]

I love how you look so happy in all your videos!

[@oliverkalali]

Apart from great scientific approach to testing and high quality content, I believe one of the reasons of the success of this channel is that you're generally a likable person! I see a genuinely honest and kind and calm person. Stay as you are :)

[@leblancexplores]

I really wish there were more strap sort of devices out there like the Whoop with no display. I don't really want to "compete" with my health figures daily, just know about them periodically and have a more capable battery than most watches that do this thoroughly.

[@MarksTech]

why do you wanna know your health figures periodically? isnt the whole point of these devices to better yourself? the only way to do that is for you to compete with yourself. thats the whole point lol. its one of the reasons i bought my garmin watch, and ended up losing 30 lbs because i was competing with my previous records...

[@yuppers1]

​@@MarksTech Not everyone is the same

[@MarksTech]

@@yuppers1 I get that .. but paying 300 a year just to “sometimes” see your data, and not compete with previous self-records just seems like a hell of a waste of money lmao.

[@noadacoolmanfrommars]

@@MarksTech Just because you are not looking at your wrist every minute does not mean its a waste of money. Some people might prefer to evaluate their performance on a weekly basis to see what went good or bad the previous week and what to improve for the coming week. It all comes down to personal preference.

[@jessewocknitz4579]

There is a new one similar to whoop called cardiomood. Hopefully it gets a review soon

[@roncarvalho]

Thanks!

[@heikoyeh]

Subscribed to Whoop a week ago, it's been motivating and I care much more about my sleep now! Made a great decision based on ur review, and of course, used ur ref link! Thanks a lot!

[@LightPink]

Ale you still using it?

[@heikoyeh]

@@LightPink had a longer break and wore it again for some months. Now its off again. Stilll like to track sleep and activity, but lacks true insights for me. I try things out to influence my sleep, and wear it to get feedback. Acitivity wise, its more like gamification for me, to be more active. Overall still liking it better than any other tracker

[@Blazey]

@@heikoyeh what about now then? Thoughts on it vs oura 4?

[@darrenn141]

Wow! The amount of work you put into your videos is unbelievable! I don't know how you do it, but keep it up.

[@jakubBae]

The amount of data and info you went through for this video is insane. Thank you for the thorough analysis!

[@ChamaChama205]

Thanks! Fantastic content. I was on the fence about trying it out and your video has exactly the kind of information I was looking for. *Edit: Loved the joke at 22:40

[@TheQuantifiedScientist]

🙏🏽 Glad it was helpful!

[@hubertarciszewski1897]

Thank you for this review. Im WHOOP user for 2 weeks and was wondering how the data is accurate. Mainly I bought it for sleep measurement and now I know that I choose the best option in the market. Also for training I mainly do running and hiking and as you have showed WHOOP shows HR accurately for that activities. For my needs it seems the best option.

[@diamondswiper]

for the amount of effort put in this video is deserves much more views

[@jackdaniellong]

i would like to see another video based upon the wrist data. Whoop has confirmed this is the most accurate

[@5ervalkat192]

This is an excellent review, as always. I was thinking about getting the Whoop because it measures sleep so accurately for a wrist device, but the subscription cost and the lack of even a simple display changed my mind. For now, my Fitbit Versa 3 will do. Thanks for the video!

[@BeRacks]

Thank you for such an in-depth review! This is the first vid I've seen of yours, but won't be the last

[@FishNoChips]

we need nerds like this guy. good work.

[@AndreaStrazzeri]

Grazie.

[@gregoryv000]

Wow omg the dedication you put in to your videos, I am so impressed!

[@vinvenus4581]

I haven't watched a video of your's for one year and now I am super happy that you have gained so many subscribers. Congratulations!!!!

[@zed9zed]

I'm amazed at how good the Apple watches appear to be compared to the Garmin. I had the expectation that Garmin should be at the top of performance based on their focus in sports body tracking.

[@MyLifeInTheDesert]

I have two garmin watches, a whoop, and an Apple Watch - and they all agree on resting heart rate and similar data that you want to track over time. Also all of them agree on HRV data.

[@screencast7376]

I know you probably dont see every comment, but your channel is the best channel for this genre on KZbin! No one comes close. Thank you so much for the quality content.

[@45montini]

The depth of this review makes me wonder How this content is free !? Incredible thank you

[@anthonycraig274]

This has to be the most important video on wearable. We know manufactures will release a product that isn’t as accurate than stated. However a subscription product will be taking your money every month for something that is poor or inadequate performance.

[@RogueCylon]

The $30/month for subscription is totally insane for the few features this tracks.

[@cristobalbalenciaga7295]

1$ a day is insane..? It’s even cheaper than a red bull😅

[@therealchickentender]

@@cristobalbalenciaga7295 Subscription model corps love you.

[@cristobalbalenciaga7295]

@@therealchickentender just like starbucks, redbull and mcdonalds love you guys

[@Seanati]

​@@cristobalbalenciaga7295Well when you put it into that perspective it seems a lot more manageable. Thanks

[@masongriffin2534]

It is a steep asking price, however it seems to have some additional trackers compared to other devices for measuring other aspects of vitality although they are not as accurate as the gold standard devices available in a clinical setting. For example, the sleep tracking was the selling point to me because at the time, around a year ago, the sleep tracking offered more information than Apple Watch tracking. However I’m not sure how they compare today with the new series 9 and ultra 2. Once Apple can track sleeping at least as good as whoop can, I’ll switch.

[@sko1ind366]

Your freaking amazing, really debating with myself if i should buy it :-) these videos always helps a ton

[@TheQuantifiedScientist]

Glad I could help! In the end it really depends on your personal preferences 😊

[@patrickbarron7623]

I once heard Matt Walker mention something about wearing socks and gloves to sleep to warm the extremities. This theoretically draws blood to the surface of the skin, away from the core, which has the heat transfer effect of removing heat from the core. So your experiment results could be explained that as the core lowers in temperature, the heat is transferred to the skin in an attempt to cool off the core, which might be why your skin temp was rising. Could be interesting to see if the reverse were true: does cooling the skin heat up the core? Kind of like a thermostat regulator?

[@TheMalteseMisfit]

Was about to post something similar from what I had heard by Andrew Huberman. The core temperature is lowest around 2 hours before waking, which would technically mean it's the time when your peripheral temperature would be at it's highest since your core releases heat to the periphery in order to cool itself

[@secretcinemalagos5662]

Yes cooling the skin .for instance ice bath. Signal the body to heat up

[@nikkil764]

Thank you for this video. I just ordered my whoop based on your review. I previously used a Fitbit for several years.

[@h3w45]

Great content, your videos are a must for anyone looking for a smartwatch by your videos i bought the Huawei GT3 pro and pretty happy with it

[@TheQuantifiedScientist]

Hi H3w4, thanks for the compliment, and happy I could help! :-D

[@joyced7592]

Best review on whoop 4 I’ve seen. Thank you for this.

[@mykcawla]

The content quality is top notch.

[@neuroidcastle]

Would love a follow up video on whoops new strength load measuring capabilities announced recently.

[@neoneherefrom5836]

That strikes me as a huge gimmick.

[@jonathandutton8071]

Hi 👋🏼 My wife has just been diagnosed with psoriatic arthritis at a vwry young age (29) after ~5 years of exploring why she has chronic pain and fatigue (blood tests, exploratory surgeries, fibromyalgia diagnosis, 3 x lumbar punctures). I've heard you mention that you too have chronic pain. I'm strongly considering the whoop band to get her into better health and to try track her body stress levels as the chronic pain means she is never really feeling good enough to exercise. She wants to improve though. This device and others like it (Oura, Sleep8, ultrahuman etc.) are very difficult to get in South Africa, and very $$$ because of our weak currency. Wpuld love to get your opinion on whether you think this device wpuld be helpful inher tracking and improving her physical health, and any recommendations you might have for her. Your videos are super helpful and easy to understand btw

[@SomeoneBeginingWithI]

whoop is pretty good at tracking stress, but it has no way to alert you to high stress. If you want to know your stress levels you need to check them on your phone Some of the garmin watches track stress, and can alert you if your stress levels are high. One of the difficulties with garmin is they have so many products, all with different features, so you need to make sure you are getting one with the features you want. I think that the high stress alerts are called "relaxation reminders" in the list of features, but I can't be sure because I don't have a Garmin myself. You could have a look at both whoop and garmin and see which would be most affordable for you.

[@ThtGirlElle]

I’ve had the Whoop for almost 6 weeks now and it’s very interesting. Love the sleep stage tracker … thanks for making this review! ❤

[@liszt1967]

Thanks for this very helpful info! I wish you would test Whoop's claims about HRV and try to untangle the value of their "recovery score." The value prospect with Whoop is very different than other wearables which are usually a one-time purchase instead of a subscription, making it harder to evaluate its worth.

[@MyLifeInTheDesert]

I agree. The subscription is a tough sell but I love the whoop so far. It also pairs seamlessly with my Peloton. I find the recovery score to be very accurate. It also seems to know when I’m sick too.

[@whaleshark2625]

Great video! I'd love to see a long term review of the Fenix 7 now that it has HRV tracking (in 9.22 beta firmware). I also feel like Garmin accuracy often goes up a lot 6-9 months into a watch's lifestyle due to firmware updates etc.

[@TheQuantifiedScientist]

Noted! I will see what I can do :-D

[@AndreaStrazzeri]

@@TheQuantifiedScientist I sent you a Super Thanks. It’s not much, but I hope you appreciate it. your work is great!

[@craigcoco6014]

I would love to see this as well as an Epix owner! Thanks for the great work here!

[@abdbzm6146]

@@TheQuantifiedScientist I am confused between . Huawei gt runner and Garmin 245 music. any suggestion who is more accurate

[@harshnigam4390]

@@TheQuantifiedScientist please review mi weighing scale 2 🥺

[@sieg131]

Had to stop the video to comment. The commitment! This guy over here swallowing pills to record his temp.... farther than I can go

[@TheQuantifiedScientist]

Haha, happy to help Carl!

[@robeln792]

I mean you are to me the Ronaldo of testing for any device there is 😂. You are legit and all your content is really appreciated all the best to you 🎉🙏🏾

[@lukavujeva6584]

Great video!! Amazing! I love it when people do this kind of stuff.

[@Tariqslo]

Best channel to compare smart watch accuracy

[@alexF1989]

I love your videos, but why the choice to wear this one around the bicep compared to the other similar devices like Apple Watch?

[@oppi263]

Please review Samsung Galaxy watch 5

[@Handleneedsmorecharacters]

Excellent review. My first review of yours I’ve seen. I personally love the Whoop subscription model along with the subtlety & class of the device.

[@emilianomicucci7645]

Hi Rob very interesting video and well done with the analysis

[@betwixt3193]

Amazing content. Above and beyond!

[@jaewookim5051]

It would be interesting to see if the whoop 4.0 results would improve on some of the harder exercises to monitor such as weightlifting and outdoor cycling using some of the other accessories that Whoop had to offer. More specifically, if doing upper body workout, would the results improve if you placed the whoop monitor on a different part of your body like in the shorts that whoop sells? Essentially placing the device on a part of your body that is not actively being engaged for the workout.

[@souhaibsebbane5623]

Very interesting idea. I hope he sees this comment.

[@triancirc]

Why is it that Apple Watch is more accurate despite it also being an optical sensor?

[@MrDb4894]

Better software

[@TheDarienJim]

As a person with a statistics degree and employed in the big data industry, , I appreciated the thoroughness of this video. Be curious though how it rates against Apple’s Ultra watch. I’ve seen Whoop 4.0 usually over estimate heart rate vs Apple which is not what your graphs show. On sleep I am getting higher degree of variability with Apple vs Whoop. I’m not as scientific as you but those are my early observations with Whoop over the past two weeks since I bought it. ,

[@Mojo_DK]

I would be interested in the performance of the new ScanWatch 2

[@valentind1402]

When watching your video on the Oura ring, you compared two oura ring 3. I think that's really a good idea to compare exactly the same product during the same night to test their accuracy. I really hope you will do the same for the whoop next time. Thanks for your video !

[@i-see_deadlines220]

I think this is great, I would null some of the data and your conclusion purely because the location of the devices are different. And the control device wouldn’t have minimal interference like you stated.

[@xzaviergodinez5048]

omg, I love this guy, knew what I wanted, and how I wanted it

[@jonasroman4180]

Thx!! I wanted to try whoop but after watching your video I will stay with my Apple Watch ⌚️

[@MariaSilva-hq7fh]

Love seeing your videos! Could you repeat this video with whoop? Would be nice to see the softwares updates they did what improved and how much.

[@aparagarwal1234]

Great review, I have just ordered a Whoop 4.0 using your promo code! I am still skeptical about it but still ordered.. already using a AW7.. let's see how Whoop behaves!

[@lewdude2k8]

Seeing as your still on the trial - did you see apples new announcement for the new watch os? Basically makes it a whoop with the metrics so might be a good idea to look so your not locked into a year contract

[@aparagarwal1234]

@@lewdude2k8Yea, I did follow the WWDC and it looks promising. Need to wait for this fall once watchOS 11 is available to everyone. So far I am doing fine with Whoop, the only thing I hate is that I am wearing  watch on one wrist and Whoop on another which I don't like

[@lewdude2k8]

@@aparagarwal1234 nice. I have done a lot of testing and i can tell you my setup with whoop is the bicep band and the aw on the wrist. That way you are only wearing the Apple Watch on your wrist and the whoop out of sight. The whoop on the wrist is highly inconsistent. On the bicep band it becomes probably as accurate as the Apple Watch is on the wrist. Highly recommend the bicep band if you are to stick with whoop. All the best

[@ccon8]

Great video. I prefer whoop over Apple Watch simply because the whoop is more rugged and fits more of my lifestyle. I do martial arts and have whoop on me, even take it in the sauna. Something that I cannot do with Apple Watch and other wearables

[@konnorkininmonth452]

Fantastic video and I love your approach to analyzing something.....using SCIENCE

[@johnwayne3491]

I’d love to see APPLE WATCH ULTRA VS WHOOP 4.0. Amazing in depth review.

[@alecalmanovici]

The video is great! How about HRV? It's such a crucial metric for Whoop, would be great to see some data about that too.

[@adrianagiles7767]

Love the scientific analysis. Thankyou. Interested to see how the HR data compares if you wore the WHOOP on the chest vs polar strap on chest.

[@baruchben-david4196]

I'm really glad you mentioned the subscription information early, so I could skip the rest of your video. Like you, I much prefer to buy a device outright, rather than pay as I go; and the $20 a month subscription just turns me off. Thanks for your research and your video.

[@laoluomisade2438]

Can’t wait to watch your review of the Garmin 255. I wonder if the smaller size and the upgraded elevate 4.0 heart rate monitor in it will make it more accurate

[@masongriffin2534]

The one question I have is how does the performance change as they update their firmware/software and algorithms? Your data shows that the whoop3 performed differently than the 4 but in later videos the whoop 4 had less agreement across sleep stages. I’d like to see a mega review of a handful of the popular wrist tracking devices, mainly how the whoop4 compares to the Apple Watch ultra 2 with all the new updates to software on the whoop4, like the strength training feature, and the ultra 2’s new OS and so on.

[@masongriffin2534]

Furthermore, how much is the data affected by software updates? Does it make a difference or does the main difference come from the sensors and hardware?

[@SnakeEater503]

have you tried doing this experiment again with all the firmware updates that may have been sent out ?

[@Rajo1012]

Getting MY raw data, easily and without any delay or hindrance, that is decision-relevant when it come to selecting a brand to buy.

[@jacopogalimberti2324]

Hi, did you wear your Whoop on wrist or bicep? I noticed that if I wear it on bicep it tends to record more Deep Sleep

[@enkiandenlil]

What are some good devices for sleep tracking and HRV like whoop in 2024?

[@nikvh9027]

Great video! I get that you put the whoop on the biceps and it should perform just as well given it’s advertised also for that. However somehow I wonder now whether it would perform better vs say the Apple Watch if worn on the wrist… I guess another comparison would be asking too much…:) great video though!

[@iproallday1]

I too was thinking this same thing. I think the device would move around more on my bicep vs my wrist, especially during weight training. I haven’t checked the specs but I wouldn’t think the whoop 4 would have much worse sensors than the Apple Watch but perhaps. I also don’t know if the sensors work better in different places. Like maybe the wrist has relatively thinner skin than the bicep? Maybe less fat? Less water retention? More sweat on bicep vs wrist? Not sure how these affect the sensors accuracy. Id think having different placements of devices would have less of a control of variables. Maybe the Apple Watch on the bicep would rank much lower than it is or even lower than the whoop? Idk. Maybe I’m thinking about it too much. lol. In the market for whoop or ultra human ring so this video popped up of course. The detail here is cool at least.

[@SomeoneBeginingWithI]

The solution to the whoop strap taking ages to dry is to take it off after showering and hang it up to dry. It dries much quicker when not in contact with the skin while the strap is drying you could: - not wear the sensor and accept that there will be a gap in your data - buy a second strap or another way of wearing the sensor from whoop - these are useful to have but I do think they are a bit overpriced - buy a second strap from etsy or ebay. These won't be as nice quality as the whoop strap, but they are a lot cheaper. The elastic they are made from could be a problem if you have a latex allergy but for most people it will be okay - use clothing you already own to hold the sensor against your skin Before I got a second strap, I found that ankle socks with elastic can keep the sensor against the skin quite effectively but are not 100% reliable

[@hvacgar2]

Got one two weeks back battery crashing in a day and now not charging - 48h and no response from support - is Whoop going bankrupt ??

[@danielplayer3974]

this man is awesome.

[@MrGuitarsung]

you are another level man

[@bjoerng.700]

This is really amazing how much effort you put in these tests!

[@diegotin]

INCREDIBLE CONTENT! SERIOUSLY

[@saiforos7928]

C is also the first letter of cheeky

[@TheQuantifiedScientist]

😂

[@wbhub]

Fantastic review!!

[@joelberman5981]

You’re missing the Scosche in your heart rate trackers. I have done several tests where I wore it along with a chest strap while riding an indoor bike, and it agreed to within two heartbeats the entire time.

[@julianking4900]

no sleep tracking on apple watches? i did not see any apple watch on sleep tracking graphs.fitbit charge 5 would be better than apple on this matter?

[@benjaminpion781]

Bro dry swallowed that pill while maintaining eye contact with the camera. Total chad.

[@htt507]

Thanks Rob. Great job! Wanna ask, my brother is elliptic and I’m researching different devices that could tell us when he had had a seizure at night. I own the Oura ring and think the movement tracking during sleep is useful also the heart rate tracking even though I understand it measures the heart rate every 5 mins so if he sizes between measurements then it wouldn’t show In your experience what’s the best device for the this? Keeping in my he sizes at night Thank you in advance!!

[@sigfreed11]

Does this data account for the variability of a bicep strap vs chest strap? A chest strap (or even wrist strap) will be much more consistent I would presume then on the bicep. The bicep changes shape/dimensions much more than does a chest/wrist

[@bboyqbunia608]

Amazing scientific review

[@joshuaetukudo1519]

Why didn’t you perform the tests with the whoop secured in the recommended location? About an inch above the wrist.

[@Naplemente-]

20:45 you cut off the better devices .... why ?

[@KingLee113]

great review!

[@christiantb100]

I trust a man that uses the Tommorrow Night 80s theme in R studio

[@davidnewsham896]

How do you know the Polar is the gold standard? If you do have a valid gold standard measure for comparison with the Whoop, great but you need to modify your stats work up - correlation is not the best analysis for this, you should be looking at levels of agreement not correlation and therefore perform a Bland-Altman analysis/plot.

[@bendietrich__]

Hi could you do a video whoop vs. Apple Watch ?

[@onpointux]

Great review for the Whoop but unbelievable how high the Apple Watch scores for HR. I've stopped using my Apple Watch for sports as it is completely dysfunctional during the first 2-3 minutes of any workout, or acceleration during any workout, being unable to cope with any change in the HR. Utterly worthless.

[@danielbothman3511]

would love to see an evaluation of eightsleep pod pro mattress cover.

[@adamcegan]

Same. ChiliPad too

[@jurbua]

Great video and effort Thank you very much

[@akirasuzuki9269]

It looks like WHOOP is averaging a lot over time which is why you see overall decent average agreement?

[@nicoleibundgut534]

i am looking for a relieable device to track sleep. I just found out the Dreem 2 device you used is no longer aviable for the public? Wtf?

[@JoeAlcorn]

So is that electronic pill a one-time-use thing or what? Not sure I'd want to fish that out and reuse it...

[@ahmedateeb.]

Hello bro please review HAYLOU RS4 PLUS as it is most selling smart watch

[@kingseaeast]

Triple like! Great work!

[@روح-د9ر]

Since devices are getting better and better overtime and you gigantic work is bringing this up, I start to think these companies are getting to collect huge amounts of good quality data on people. So I start to see the huge price consumer pays for accuracy. For instance, what if medical insurance companies would buy these data and price their insurance based on the results. Are we getting there ? Of course the answer is yes. But the point is.. how fast are we getting there ?

[@nx2269]

The improvement in the accuracy stats from whoop 3.0 to 4.0 make a subscription seem useful…always get the newest gear?

[@richjlaw]

Looks like the Whoop algorithm is removing what it thinks is noise so misses really sharp spikes and troughs - but presumably they tested this and know that otherwise there are false-positive spikes that make the average correlation worse.