Heart rate variability: a key fitness and health indicator

oglobo.globo.com (Portuguese)

Heart rate variability (HRV) is gaining attention as a fitness and health metric. HRV measures the time variation between heartbeats, indicating the body's ability to adapt to stress and recover. Lower HRV can signal fatigue or mental health issues. Smartwatches are popularizing HRV, but experts advise interpreting trends over time rather than isolated numbers, alongside traditional health indicators.


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Heart rate variability: a key fitness and health indicator | News Minimalist