# Biological Age Intelligence: Track How Fast You Are Aging

A dedicated suite that turns a complex longevity model into actionable feedback.

February 6, 2025 • Metric Team • 8 min read

Biological age is the north star metric inside Metric. It blends cardiovascular fitness, strength markers, body composition, sleep quality, and recovery consistency into a single score that tells you how youthful your physiology acts compared with your chronological peers.

## What you see in the app

The Biological Age view opens with an aging rate capsule that shows your calculated age, whether you are trending younger or older, and how confident the model is in that assessment. Scroll and you will find spider charts, research explainers, and the habit checklist that links directly to daily rituals.

- Gauges highlight how far each contributing metric sits from longevity-supported target zones.
- Trend cards reveal how your actions over the past three months influenced aging velocity.
- Explainers translate complex physiology into plain language so you understand why VO₂ max or sleep regularity matter.
- Sources view keeps the underlying samples transparent, giving you confidence when you discuss results with a coach or clinician.

## How it guides decisions

When the model detects that sleep inconsistency is accelerating your aging rate, Metric shifts focus to recovery rituals and bedtime nudges. If strength sessions move the needle in a positive direction, the habit checklist updates to double down on progressive overload and protein timing. Everything stays personalised to the inputs that matter most for your body.

Trend horizon **90 days** Smoothing windows protect you from reacting to short-term spikes while staying responsive to real change.

## The science it is built on

Our biological age model is informed by longitudinal research from institutions such as Stanford, the Karolinska Institute, and the UK Biobank that links cardiorespiratory fitness, muscle mass, inflammation, and sleep quality to mortality risk. Metric translates those findings into approachable visuals so everyday users can act on the same evidence scientists rely on.

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Open the Biological Age view the next time you complete a training block or finish a travel-heavy month. You will see exactly how lifestyle choices echo across your physiology—and where to focus next.

[Review your biological age in Metric](https://apps.apple.com/us/app/metric-live-longer/id6630364978)

#biological age #aging rate #longevity analytics #metric features