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Polar Launches Whoop-Like Screenless Fitness Tracker, No Subscription Needed The Polar Loop monitors activity, sleep, and heart rate in a design familiarized by Whoop. The key difference is a one-time ...

Experts note that implantable loop recorders are valuable for detecting infrequent arrhythmias and guiding anticoagulation decisions post-cryptogenic stroke or atrial fibrillation ablation, but due to ...

Heart rate is one of the most valuable physiological metrics for runners because it provides objective real-time insight into how hard your body is working. Unlike pace or distance, which are external ...

Keeping track of your heart rate while working out is now easier than ever, thanks to wearables like smartwatches and fitness trackers. However, the gold standard for heart rate data is a chest strap ...