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

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🟡 Twitter: @QuantifiedRob
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Timestamps:
00:00 Background
01:47 Whoop Strap 4.0 Features
04:22 Heart Rate Test Spinning
08:47 Heart Rate Test Cycling
11:20 Heart Rate Test Weight Lifting
14:11 Heart Rate Test Other Workouts
15:02 Sleep Stage Testing
20:10 Sleep Stage Test Overview
21:44 Body/Skin Temperature Test
24:16 Other Good and Bad Features
25:11 Health Tracking Conclusions

Intro: The Whoop strap as a device mostly focuses on health tracking, and not so much on smartwatch features. This also means it has no screen or any interface at all on the device itself, and it is mostly designed as a health monitoring device. The Whoop Strap keeps track of your health in several ways: it can measure your heart rate, skin temperature, breathing rate, oxygen saturation and heart rate variability. Your heart rate will be measured throughout the day and night, and if you start a sports activity, the frequency of measurements will go up, and the app will show a graph of your heart rate after the workout. What I believe is potentially even more important, is that throughout the night it will measure your resting heart rate, respiratory rate, heart rate variability, skin temperature and blood oxygen levels. Measuring this during the night is one of the optimal times to measure these metrics, and the app will show you if there were any deviations from your normal range, which could indicate there are some health issues. An increased skin temperature could for instance indicate that you are suffering from an infection such as COVID-19 or the flu, and a high resting heart rate could be an indicator of poor recovery. One of the benefits of the Whoop Strap is that you can wear it in many different locations, and I personally prefer to wear it on my biceps, which is also what most of the test results in this video will be based on. However, Whoop offers many more options of where to wear the device itself, and the device should be able to work out where it is located automatically. You can for instance wear the whoop strap 4.0 in your boxers, thong or in a compression top. The major downside of the Whoop Strap for me is the cost. Whoop has completely embraced the subscription model, charging you a certain amount of money each month to use their device and app, but charging you no money up-front for the device itself. The main question I will try to answer in this video is: can we trust the metrics and measurements the Whoop Strap 4.0 provides?

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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!

MysticMac

production quality just keeps skyrocketing even higher!

ShervinShares

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

bodihearn

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.

leblancexplores

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

riverfuss

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

kongkongball

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 :)

oliverkalali

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

darrenn

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

jakubBae

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!

heikoyeh

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.

hubertarciszewski

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

BeRacks

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

jackdaniellong

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

ChamaChama

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!

ervalkat