Whoop Strap 4.0: Science Review

Twitter: @QuantifiedRob

👇 $30 off any new WHOOP membership, affiliate* (paid) link, supports the channel!👇

👇Amazon Affiliate* (paid) links. Supports the channel, doesn't cost you any more!👇

📸My Gear* (paid links, supports the channel and doesn’t cost you any more)📸

⏱️This comparison is part of a larger project where I spend over 11 hours a week tracking everything in my life. If you'd like to know more:

Timestamps:
00:00 General intro
00:55 Results: Sleep Test
04:32 Results: Sleep Whoop 4.0 vs 3.0
05:54 Results: Sleep Compared To Others
06:56 Results: Heart Rate Test
09:54 Results: Heart Rate Biceps vs Wrist
11:12 Results: Heart Rate 4.0 vs 3.0
13:19 Conclusions
14:02 Buy The Whoop Strap 4.0?

🎵Music🎵
(2) Wonders by JVNA
(3) Can’t Sleep (YouTube Audio Library)
(4) Classique (YouTube Audio Library)
(5) Blurry Vision (YouTube Audio Library)
Person Waking up Video by Ba Tik from Pexels

Many thanks to Rob and Frederik (and his FUN:D SCIENCE FOUNDATION) for their help with the OpenBCI device.

[TheQuantifiedScientist]

👇 $30 off any new WHOOP membership, affiliate* (paid) link, supports the channel!👇
($30 off any new WHOOP membership)

[mikamika]

Make a playlist of the watches which are atleast 95% accurate according to you.. It will be really helpful.... And i Love your videoss 😇

[Janninatore]

Will there be a follow-up? It has been a few months, I'm wondering if they improved it since then?

[kumartamil]

🎯 Key Takeaways for quick navigation:

00:00 *🛏️ The Whoop Strap 4.0 undergoes scientific testing against an EEG monitor for sleep tracking accuracy.*
01:57 *💓 Heart rate monitoring of the Whoop Strap 4.0 appears to have issues during deep sleep, possibly due to false peaks in heart rate detection.*
03:21 *🌙 The Whoop Strap 4.0 demonstrates good agreement with an EEG device in detecting REM sleep stages.*
04:44 *🔄 Comparison with the Whoop Strap 3.0 shows that the 4.0 model performs slightly worse in deep sleep tracking.*
06:52 *📊 The Whoop Strap 4.0 performs well overall in sleep tracking but may need firmware updates for better heart rate accuracy.*
07:07 *🚴‍♂️ Heart rate accuracy during spinning exercises shows good agreement with chest strap measurements, though slightly lower readings.*
09:28 *🏋️‍♂️ The Whoop Strap 4.0 struggles with heart rate tracking during weightlifting, showing issues in capturing peaks.*
10:42 *⌚️ Wearing the strap on the biceps tends to yield slightly better performance compared to wearing it on the wrist, especially during spinning sessions.*
11:38 *🔄 Comparison with the Whoop Strap 3.0 reveals that the 4.0 model generally performs slightly worse in heart rate accuracy during exercises.*
13:46 *💡 Firmware updates may improve heart rate tracking of the Whoop Strap 4.0, potentially bringing it on par with the 3.0 model.*

Made with HARPA AI

[louiswarren]

Commenting just for the algorithm, I really enjoy the unique information you provide, great stuff!

[williamstevenson]

The best and most useful proper reviews of these devices, as far as I know.

[jameshuegli]

Like many others I’m waiting for my 4.0. Hopefully there will be some firmware updates released before it arrives that fix some of the accuracy issues. Maybe a follow up video in a few months will be warranted to see if things improve.

[cashmoney]

Why do you have the Whoop4 ranked below the Fitbit Charge5, FitbitInspire2, and FitbitSense on this chart but every other chart you have the Whoop4 beating them? This is extremely confusing.

[Alaintremblay-burt]

Dude, you're killing it with your scientific reviews! Keep it up !!!

[ast]

I really appreciate your approach on evaluating the systems. But I can’t get over how you only took a sample size of 2 nights.

And yes I get it your findings show that there are cases in which HR is not correctly read and therefore sleep states are off. Thats fine. The only problem I see is putting it on a contingency table and stating that these are representative percentiles for measurement errors. You would need a much higher sample for this to be significant imo.

I would love to hear your take on this and again I really appreciate your videos.

[TheAlswied]

Is the data inconsistent or improving (showing a trend) over time @ 8:15

[triancirc]

Please let us know if the firmware updates to the whoop 4.0 increased its hr accuracy or is it still the same as in this review

[baristadrifter]

From release till now I’ve only waited to see you review it before considering if I’d purchase it!!
So glad to see this review finally be release!! 😁
Great work as always!!

[zlaureti]

Thanks for your well made videos. Straight to the point with meaningful numbers. Keep up the good work. I am glad you covered the whoops 4.

[NAKMUAYACADEMY]

Which one is all round best for heart rate during training, sleep activity and hrv ?
Whoop
Polar
Garmin
Morpheus
Or
Maybe some other ?

[mattb.]

Great review as always! Love this deep dive method! Also really happy to see so much content being pushed out especially because you keep the quality of it absolutely top notch!!!!

[AMan-thsy]

I’ve been waiting for WHOOP 4 video 😍😍

[Rachaelshaw]

Well done. I hope whoop is taking notice

[RamyJu]

Hi, is there an update on new heartrate results for the whoop 4? thank you!

[Toogas]

great review! as always! waited so long for a channel like yours!