Agegrouper – Life in motion

Fitness percentiles by age

How fit are you for your age?

Agegrouper compares your fitness with published reference data for people of your exact age and sex. You see your percentile in six dimensions, and how it moves as you train and as you age.

Try it with example data Join the pilot
Agegrouper dashboard: a 69th overall percentile and a hexagon chart of six fitness dimensions
Example athlete, 44, male. The dashed outline shows the same person 12 months earlier.

Six dimensions of fitness

Each dimension combines one or two measures that research links to health and performance. A percentile of 70 means you score better than 70 out of 100 people of your age and sex.

Cardio

VO₂max and resting heart rate.

FRIEND registry · NHANES

Strength

Grip strength and push-ups to fatigue.

Dodds et al. 2014 · CSEP

Body composition

Body fat percentage.

Cooper Institute · ACSM

Mobility & balance

Sit-and-reach and standing on one leg with eyes closed.

CSEP · Springer et al. 2007

Activity

Daily steps, averaged over 30 days.

Tudor-Locke et al. 2009

Recovery

Overnight heart rate variability (RMSSD).

Natarajan et al. 2020

How it works

  1. Bring your data

    Import your Garmin Connect data export or a CSV, and add simple tests such as grip strength or push-ups by hand. Each test comes with instructions.

  2. Compare by exact age

    Reference tables usually come in ten-year brackets. Agegrouper interpolates between them, so a 44-year-old is compared with 44-year-olds, not with everyone from 40 to 49.

  3. Follow your trend

    Monthly charts show your percentile over time and your raw values against your age group's percentile bands.

Science and privacy

Reference values come from peer-reviewed studies and national health surveys, including the FRIEND cardiopulmonary exercise registry, the US National Health and Nutrition Examination Survey and the Cooper Institute norms. Every source is cited in the app.

Agegrouper is for orientation and motivation. It is not a medical device and does not give medical advice.

  • Hosted in SwitzerlandData is stored with a Swiss hosting provider.
  • No advertising, no data salesYour data is used only to show you your own results.
  • Delete any timeRemove single measurements or all of your data from within the app.

Pilot from October 2026

We are starting with a small, free pilot group of 10 to 20 people. If you train with a Garmin device and want to take part, write to us.

alex.kobler@bluewin.ch

On iPhone: open the app in Safari, tap the Share button and choose Add to Home Screen. Agegrouper then opens like an app, with its own icon, and works offline.