Can One-Legged isometric exercises boost soccer performance?

NCT ID NCT07556315

Completed Knowledge-focused Sponsor: The Jerzy Kukuczka Academy of Physical Education in Katowice Source: ClinicalTrials.gov ↗

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at whether adding isometric strength exercises (like holding a squat against a bar) to an 8-week training program helps youth soccer players jump higher, sprint faster, and get stronger. Forty-one male players aged 15-19 were split into groups doing unilateral (one leg) or bilateral (both legs) isometric exercises, or just the regular program. The goal was to see which type of training works best and whether it reduces strength differences between legs.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance: isometric strength training exercises
What this could lead to: If it works, this could help coaches design better training programs to improve young soccer players' performance and reduce muscle imbalances.
What could go wrong: This is a small, early-stage study with only 41 male players, so results may not apply to females or other sports. The training is just 8 weeks, so long-term benefits are unknown.

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

ATHLETIC PERFORMANCE RESISTANCE TRAINING SOCCER

Contacts and locations

Locations

Academy of Physical Education in Katowice

Katowice, Silesian Voivodeship, 40-065, Poland

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