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Is a heart rate over 200 when exercising unsafe?

For most people, it is. Your age and overall health help determine a healthy heart rate. Learn more about the causes and risks of a speedy pulse.
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What Is a Normal Heart Rate When Walking Slowly?

Normal Slow Walking Heart Rate Causes of Faster Heart Rate Measuring Heart Rate How to Lower Heart Rate When to See a Doctor You may know your target heart rate when working out or your ideal heart ...
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What is resting heart rate and why is it important for your health?

It may sound dramatic, but the rate at which your heart is beating plays a key role in how long you’re likely to live. According to expert cardiologists and academic researchers, resting heart rate ...