Pace of Aging tells you whether your True Age is getting better, worse, or staying the same over time. It's expressed as a multiplier, like 0.8x or 1.2x, that shows how fast you're aging biologically compared to how fast you're aging chronologically.
What the numbers mean
1.0x = Holding steady
Your True Age is changing at the same rate as your chronological age. If you're 40 years old and your Pace is 1.0x, your True Age is moving forward one year for every year that passes.
Below 1.0x = Rejuvenating
Your True Age is improving. If your Pace is 0.8x, Your True Age is only increasing 0.8 years for every chronological year. You're effectively aging more slowly than the calendar suggests.
Above 1.0x = Accelerating
Your True Age is declining faster than your chronological age. A Pace of 1.3x means your True Age is increasing 1.3 years for every chronological year.
Negative values = Reversing
Your True Age is getting younger in absolute terms. This happens when your cardiovascular fitness, heart metrics, and lean muscle mass are all improving simultaneously.
How Pace of Aging is calculated
Pace of Aging uses linear regression: a statistical method that finds the trend line through your True Age measurements over time.
Data requirements:
Minimum: 4 weeks of True Age measurements to start showing Pace
Calculation window: Up to 16 complete weeks of True Age data
Updates: Every Monday alongside your True Age update
What this means:
Your Pace becomes available after you have at least 4 weeks of True Age data
As you accumulate more weeks (up to 16), the trend becomes more stable and accurate
The calculation uses complete weeks (Monday to Sunday) of True Age measurements
How to interpret your Pace
It's a trend, not a snapshot
Unlike True Age, which tells you where you are right now, Pace tells you which direction you're heading. It's calculated over weeks and months, not days.
Week-to-week changes are normal
Your Pace may fluctuate as new data comes in and old data drops out of the calculation window. A single week's change doesn't mean you've fundamentally altered your trajectory. It means the trend line has shifted slightly as the math updates.
Focus on the direction, not perfection
A Pace below 1.0x means your foundation is improving. A Pace above 1.0x means it's time to look at your cardiovascular fitness, heart health, or muscle mass. The exact number matters less than whether you're moving in the right direction over time.
What improves your Pace of Aging
Pace of Aging improves when the four biomarkers that drive True Age improve:
VO2max (cardiovascular fitness)
Resting heart rate
Heart rate variability
Lean body mass index
These are the foundation of longevity. When you strengthen this foundation through movement, performance training, and recovery, your Pace naturally shifts downward.