While some measures of physical fitness such as athletic ability and one's strength or stamina may be difficult to ascertain right away, others are more obvious. One's resting heart rate, for instance ...

You’re familiar with the feeling of your heart pounding in your chest, your blood pulsing through your veins with increasing frequency when you’re scared, stressed, or sweating it out at the gym.

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Your heart is always active, but it is resting when you are calm and sitting quietly for extended periods. During this ...

Sitting quietly at your desk, watching TV, or lying in bed at night, your heart should be taking it easy – beating steadily and calmly at somewhere between 60 and 80 beats per minute for most healthy ...

Whether brought on by stress, physical activity, or an extra cup of joe in the morning, most of us have all felt our heart rate quicken at one time or another. However, a lower resting heart rate ...

If you’ve ever bolted awake from a nightmare with your heart beating like a frenzied drum, you already know that sleep and rest are not the same. Which is why it should make sense that neither are ...

Of all the metrics that wearables track, resting heart rate (RHR) is an easy one to gloss over. It’s not as sexy as VO2 max, ...

Heart rhythm is an important vital sign that everyone should be aware of as it is an indicator of overall well-being. When ...