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Metrics & Biomarkers

3 articles

A stethoscope resting on fabric, photographed in black and white
Metrics & Biomarkers

Resting Heart Rate: What Your Simplest Metric Reveals About Your Health

Every wearable measures it, and few numbers say more: resting heart rate tracks fitness, recovery, stress and long-term health risk. Here’s what large studies show, what counts as normal, and how to lower yours the honest way.

9 min read
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Silhouettes of runners on a track against a blue dawn sky
Metrics & Biomarkers

VO2max Explained: Why Your Aerobic Fitness Predicts How Long You'll Live

VO2max is the single best measure of cardiorespiratory fitness — and one of the strongest predictors of longevity ever measured. Here's what it means, why it matters so much, and the training that reliably raises it at any age.

9 min read
Racks of colour-coded blood sample tubes in a laboratory
Metrics & Biomarkers

Blood Work for Longevity: The Biomarkers That Actually Predict Your Healthspan

Heart disease and metabolic dysfunction build silently for decades, but they leave early traces in your blood. Here are the biomarkers with the strongest evidence — ApoB, HbA1c, fasting insulin, hs-CRP — and how to turn a one-off result into a trend you act on.

9 min read