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Where Does That Number Actually Sit?

Your teenager jumps 178 cm from a standing start, or holds a plank for ninety seconds. Good? Ordinary? Worth training? Enter one measurement and see where it falls on a published reference curve for their age band — with the study it came from printed underneath it.

A teenager at the top of a standing broad jump on a lawn, both feet clear of the ground, with a tape measure along the grass and a parent crouched at the landing mark.
1

Who is being tested?

The reference tables are published separately by age band and by sex, so both change which curve applies.

Spatrian covers ages 13–18 (U14, U16 and U18). Bands for younger children are in development and have no reference data here yet.

2

Which test?

Eight tests, run with a tape measure and a phone timer. Pick one — you can add the others afterwards.

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What the bands mean

A result is a position on a population curve, not a grade and not a placement. The three bands exist so a parent can tell at a glance whether something needs attention, and nothing more than that.

  • Strong for the age bandAt or above roughly the 60th percentile of the reference population.
  • Within the typical rangeBetween roughly the 25th and 60th percentile. The great majority of children sit here, and that is the point of the band.
  • Below the typical range — worth trainingBelow roughly the 25th percentile. A prompt to train the quality, not a diagnosis of anything.

The most useful comparison is not against the curve at all — it is against the same child eight weeks ago. That is the number that tells you whether the training is working.

Every band cites its source

Four of the eight tests are scored against peer-reviewed normative studies of youth fitness, reproduced as published. The other four have no widely published youth reference we could reproduce faithfully, so they are scored against Spatrian's own working scale, derived from typical performance in each age band. Those are labelled provisional wherever they appear — on this page, in the app, and with an asterisk in the portfolio PDF.

We say every band cites its source rather than that results are scored against national standards, because the second would be true of only half of them.

What this page will not do

  • It does not measure anything. A parent with a tape measure does. Nothing here uses a camera, and no video is uploaded or analysed — you run the test, you read the number, you type it in.
  • It does not ask for height or weight, and never comments on either. Body composition feedback does measurable harm in exactly this age group, so the product does not compute it and this page does not collect it.
  • It does not place your child against anybody else's. The curve is a fixed published distribution. There is no ranking here and no table of other families — that was a deliberate decision, not an omission.
  • It stores nothing. The measurement is scored by a stateless request that writes no record. Saved results live in this browser and go no further.

One test at a time is the free version

Spatrian runs the full eight-test combine as a guided session — spoken cues and a countdown for each test, one number to type, the whole battery in about forty minutes. It keeps the history against your child's own past results, scales training load around a growth spurt, and drops the results into the portfolio PDF with every citation attached, where a district evaluator can read them.

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Reference data for the eight tests is served from the same module the app scores against, so this page and the product can never disagree about a band. Percentiles are interpolated between published cut-points and clamped at the 1st and 99th — beyond the range a study published, we say so rather than extrapolating. Nothing here is medical advice; a result that worries you is a conversation with your child's clinician, not a diagnosis from us.