Player measurements: what to measure and how often
One number means nothing. The same number taken three times across a season, under the same conditions, means nearly everything you need.
A measurement never repeated is time spent
Testing at the start of preparation and never again gives you a picture of one day and nothing else. The value is in the difference, and a difference needs at least two points — taken the same way.
The same way means actually the same:
- The same day of the week and the same time of day.
- The same place in the week — not once after a rest day and once after the hardest session.
- The same warm-up, the same equipment, the same person measuring.
If any of that changed between two measurements, so did the result, and you cannot tell how much of it was the player and how much the conditions.
How often
| When | What it is for |
|---|---|
| Start of preparation | The starting point for the season, and who came back in what state |
| End of the preparation period | Whether preparation did what it existed to do |
| Middle of the competition period | Whether form is holding or quietly slipping |
| End of season | Closing the loop, and the basis for next year |
Four times a year is enough for most clubs. Measuring more often does not give more information, only more numbers — and every measurement costs a session.
Body measurements and test results are not the same thing
Height and weight change slowly and, in younger age groups, on their own. A child growing is not a training result and should not be read as one. Test results — a jump, a sprint, endurance — respond to what you did, and only those say anything about the programme.
With younger age groups be especially careful comparing players against each other. A year's difference in maturity creates a gap no programme can close, and treating that gap as talent is the most expensive mistake made in youth sport.
How a result is read
A measurement is compared with the same player earlier, not with the squad. A table sorted best to worst answers a question nobody asked; a column with three dates for one player answers the one that was.
And always next to attendance. A drop for a player who missed a month is not a loss of form, it is a consequence — and that is the first thing to check before anything in the programme is changed.