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Is a resting heart rate of 55 BPM dangerous for a 19-year-old? Should I be concerned about this? I'm not particularly active but I've started exercising and got a Fitbit which is
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Lowest resting heart rate competition
How do you compare? Jabra Sport Pulse is optimized for all runners with features such as a built-in heart rate monitor and will help to analyse your fitness lev…
Pensioner Daniel Green records 'world's slowest ever heart beat' at 26bpm | Daily Mail Online
Everyone's heart beats at its own pace, study finds
Usain Bolt, a Collapse, and an Epic Beer Mile | The New Yorker
Usain Bolt talks running, speed, his body, fame and selfies ahead of the 2016 olympics | British GQ | British GQ
Here's all you can do in 9.58 seconds, Usain Bolt's best 100m time | Olympics - Hindustan Times
Track's Heartbeat Is Fast as Ever in Jamaica - The New York Times
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What If Your Overnight Heart Rate Has Nothing To Do With Your Cardiovascular Fitness | by James McCarter | Medium
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Here's all you can do in 9.58 seconds, Usain Bolt's best 100m time | Olympics - Hindustan Times
Your resting heart | The Star
How Does Resting Heart Rate Relate to Longevity? - InsideHook
Here's all you can do in 9.58 seconds, Usain Bolt's best 100m time | Olympics - Hindustan Times
Usain Bolt — The Wonder of Science
