Strength training or plyometrics for swimmers? What better test results mean—and what remains unproven

When an athlete improves in a program, the explanation seems immediate: he responded well to that method. But it is necessary to ask what improved, how measured and how much the test looks like the exercises practiced.

A survey with university swimmers offers an opportunity to understand these differences and to avoid rash labels of “good responder” or “bad responder”.

How the intervention was organized

Twenty-seven swimmers were distributed between maximum strength, pliometry and an active control of muscular endurance. The work lasted six weeks, with two weekly sessions. The results combined upper and lower limb tests in power indicators.

The maximum force produced greater change in the index of the upper limbs. The two interventions surpassed control in the upper and lower indicators. The identified response profiles were strongly aligned with the training group. The authors themselves warn that this does not demonstrate fixed biological types of athletes nor universal superiority for water performance.

The test can favor what has been trained

Part of the upper limb indicator came from the power in the supine, exercise practiced directly in the strength group. The lower limbs tests included jumps close to the tasks of pliometry.

Enhancing in a task practiced is a legitimate result. The problem appears when the result is presented as an improvement of any capacity or as a guarantee of transfer to the competition.

To understand transference, we need a more distant measure of the task trained and close to the final goal. In swimming, this question may involve results in water, but each outcome requires its own evaluation. An indicator composed of power does not automatically respond by competition time.

“Answer” is a classification that depends on the context

The researchers found groupings of changes. However, if the participants of one method concentrate on one cluster and those of control on another, the classification may be summarizing the stimulus received, rather than revealing a permanent characteristic of the person.

This helps to understand why a label should be treated with caution. Reply little in a test, during a short block, does not show inability to adapt to another task, duration or program.

There are also limits of measurement and familiarization. A responsible analysis needs to consider how much change can reflect the practice of the test itself, and not just a broader transformation.

Editorial example: two ways to evaluate the same program

A coach includes a block of strength and observes significant improvement in the supine. The first question was answered: the athlete improved in that task. The second one remains open: is the gain helping the pool's goal?

To investigate, it would be necessary to define previously a pertinent result and follow it consistently. If the time in water does not change in the same period, this does not erase the gain of force, but prevents announcing a transfer already demonstrated.

The example shows why complementary evaluations are useful. Measuring only what has been trained can confirm the execution of the program without clarifying its usefulness for the competition.

How to interpret the comparison between methods?

The research was brief and carried out in college students with relatively modest water volume, far from representing the entire context of international swimmers. The results do not define which method will be best for all or offer a validated talent selection system.

The main learning is to choose the test according to the question. Strength and pliometry can be investigated as planning tools; the sports benefit needs to be demonstrated in the outcome that really interests the swimmer.

Cada um no seu ritmo. Juntos no caminho.