Skip to content
Pulsyn
Back to all posts

Posts tagged: Hrv

11 posts found

An abstract visualization of the human nervous system and stress response, representing the complex physiology behind fabricated wearable stress scores
StressHrvWearables

Why Stress Scores Are the Most Fabricated Metric in Wearables

Every major wearable gives you a stress score between 0 and 100. That number is not a measurement. It is a proprietary blend of heart rate variability and secret sauce with no clinical definition. Pulsyn shows you the raw HRV and the context instead.

James Hoffmann James Hoffmann
May 26, 2026 13 min read
A medical electrocardiogram monitor showing heart rhythm data, representing the raw physiological signal behind HRV analysis
HrvRecoveryWearables

What HRV Actually Measures and Why Your Recovery Score Is a Marketing Invention

HRV is not a score. It is a noisy physiological signal that consumer wearables clean, compress, and repackage as a recovery percentage with no medical validation. This post explains how the sausage is made, why the math does not support the marketing, and what Pulsyn does instead.

James Hoffmann James Hoffmann
May 26, 2026 12 min read