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Heart Rate Variability
The variation between your heartbeats, and what the research says it reveals about recovery.
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Heart HealthHow to measure your resting heart rate at home: 5 methods
Two fingers and a clock will do it. Four other methods will do it with less effort, or more precision, or both.
Heart HealthResting heart rate by age and sex: the normal ranges
The clinical range is the same for every adult. Where people actually sit inside it is not.
Heart HealthWhat is a normal resting heart rate? A guide for all ages
The adult range is 60 to 100 beats per minute, but that hides a lot. Here is what is normal at every age, and what moves the number.
The ScienceHRV during GLP-1 weight loss: what changes and why
A drop in the first few weeks is common, and it usually has a straightforward explanation. Here is what the data tends to do, and what is worth raising with your doctor.
The ScienceHRV and stress: what your nervous system is telling you
Your nervous system does not distinguish between a hard training session and a hard week. Both show up in the same number.
The ScienceHow to measure HRV at home: the three methods explained
A chest strap, a wrist wearable, or your phone camera. Each uses different technology, measures at different moments, and gives you a different kind of data.
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