Or an Apple Watch, thanks to its wealth of third-party apps. Polar has nailed something just ... heart rate variability and beat-to-beat interval. Wearable ECGs are useful when they identify ...
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I tracked 10,000 steps with Samsung, Apple, Garmin and Polar – here are all the differencesThe smartwatches, however, varied more – the Polar clocked in 273 steps higher than the iPhone, while the Garmin was more middle-ground at 117 steps above the Apple count. On the return leg ...
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