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Buy Wellue O2Ring Oxygen Monitor - Pulse Oximeter Bluetooth Recording blood oxygen level and Heart Rate, O2 Tracker with Free APP Records | iF Design Award Winner Online at Lowest Price in
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This French biathlete's 25 BPM resting heart rate is so low it's scary - SBNation.com
Pensioner Daniel Green records 'world's slowest ever heart beat' at 26bpm | Daily Mail Online
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