Shoulders & resilience

Why Timing Changes What the Data Means

For head coaches and aquatics directors

Most programs that test their swimmers on land test them at the wrong time. Not because anyone chose badly, but because testing tends to happen when it is convenient rather than when it is informative.

The difference between those two moments is most of the value.

The tension

A championship-season test tells you where a swimmer is.

It does not tell you how she got there. And that second question is the one a coach actually needs answered.

Consider two swimmers who post identical dryland numbers in February. One arrived in September below that mark and has gotten stronger through the season. The other arrived well above it and has been ground down by five months of yardage. Same February number. Opposite situations. Opposite decisions required.

Without a baseline, those two swimmers are indistinguishable. You are looking at a photograph and trying to infer motion.

What a baseline buys

A number taken before the season’s yardage piles up converts every later test from a snapshot into a trend.

That changes what you can ask. Instead of is this swimmer strong, you can ask is this swimmer holding up. Instead of is this asymmetry large, you can ask is this asymmetry widening. The first version of each question is interesting. The second is actionable.

It also protects against a specific and common misreading. Swimmers at this age are growing. A twelve-month period can bring substantial changes in height, limb length, and coordination that have nothing to do with training or yardage. Without an early reference point, normal developmental change and accumulated fatigue look similar on paper — and they call for completely different responses.

The practical window

Earlier is better, and the reason is mechanical rather than motivational.

Once meaningful yardage has accumulated, every subsequent measurement contains two ingredients mixed together: what the swimmer brought into the season, and what the season has done to her. There is no way to separate them after the fact. You can only avoid mixing them in the first place.

This is why the timing matters more than the sophistication of the test. A simple dryland test run early is worth considerably more than a comprehensive one run during taper.

What this means in practice

For a program, the useful sequence is straightforward:

Baseline early — before or at the very start of the season’s build. This is the reference everything else is measured against.

Re-test mid-season — the comparison point. Reveals who is holding up under the yardage and who is drifting.

Re-test after championship season — closes the loop. Shows what the season cost, and informs what the break should address before the next build begins.

Three touchpoints across a season. None of them touch the water — a dryland baseline fits inside dryland time already on the calendar.

The honest caveat

A baseline taken now is less useful than one taken last September. That is simply true, and there is no way around it.

But a baseline taken now is substantially more useful than one taken during taper, and it is the reference point for every season after this one. The window closes gradually rather than all at once.

The takeaway

Testing produces data. Testing at the right time produces meaning.

The gap between those two is not about better equipment or a longer protocol. It is about having an early number to compare against, so that every measurement afterward tells you about direction rather than just position.

Athlete Academy works with swim programs as the dryland performance arm — strength, start and turn power, and shoulder resilience — so coaches can stay focused on the water.

This article supports our deeper guide: Shoulders & resilience.