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Health Insights
These articles explain how important health metrics such as heart rate variability (HRV), sleep quality, stress levels and cardiovascular fitness relate to recovery and long-term health.
Understanding these metrics helps interpret data from wearables, fitness trackers and health apps and gives insight into sleep, recovery, training and longevity.
HRV
What heart rate variability reveals about stress, recovery and nervous system health.
What Is a Good HRV?
Typical HRV values and what they mean for recovery and stress.
HRV by Age
How heart rate variability changes across age groups.
How to Increase HRV
Strategies to improve heart rate variability and recovery.
HRV Chart
Typical HRV values by age and fitness level.
Resting Heart Rate
What your resting heart rate says about cardiovascular health.
Resting Heart Rate by Age
Typical resting heart rate values in different age groups.
VO₂max
Why VO₂max is a powerful indicator of fitness and longevity.
VO₂max by Age
How VO₂max changes across age groups.
Sleep & Recovery
How sleep supports recovery and overall health.
Sleep Score
What sleep scores mean and how sleep quality is measured.
Sleep Stages
Understanding REM sleep, deep sleep and sleep cycles.
Deep Sleep vs REM
The difference between physical and mental recovery during sleep.
Stress and HRV
How stress influences the nervous system and heart rate variability.
Biological Age
Why biological age can be more important than chronological age.
Longevity Metrics
The health signals that influence long-term longevity.