Blog post by Marco Altini Just a quick announcement that all new iPhones are already compatible with HRV4Training, you can see a short video on an iPhone 11 here on our instagram. As you know the new iPhone has 3 cameras, hence some changes were required. In particular, you will need to use the camera in the corner, as shown here: As usual, please double check our camera based measurement best practices, to make sure you'll collect high quality data on which meaningful analytics can be derived. Below you can also see two minutes of RR intervals data collected with the phone and a Polar chest strap, showing the usual agreement between the two, as reported in earlier validation studies. Enjoy! Useful resourcesCollecting high quality data is always the first step, but of course what we want to do is to make meaningful adjustments using that data. How do you do that? Here are some links that can help understanding the relation between physiology, training and lifestyle stressors:
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