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Completed

NCT Number: NCT07193706

Micro-Dosed vs. Traditional Plyometric Training in Elite Youth Soccer

The goal of this clinical trial is to learn if a micro-dosed plyometric training program works as well as a traditional plyometric program for improving speed and explosive abilities in elite under-19 soccer players during the pre-season.

The main questions are:

1. Does micro-dosed training improve explosive and speed abilites, such as jumping and sprinting, as much as traditional training? 2. Does it improve reactivity and change-of-direction ability ?

Researchers will compare two groups:

* Traditional Training Group: 2 sessions per week, about 40 minutes each. * Micro-dosed Group: 3-4 shorter sessions per week, about 20 minutes each. Both groups will complete the same total weekly training volume.

Participants will:

* Take part in an 8-week plyometric training program during pre-season. * Complete performance tests (CM jump tests, a 30-meter sprint, and a 15-0-5 change-of-direction test, broad jump test, drop jump test) before and after 8-week plyometric intervention, .

This study will help coaches and players understand if shorter, more frequent plyometric training sessions can be a good alternative to traditional longer sessions when weekly training load is matched.

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Key information

Conditions

Plyometric Exercises Explosive Strength Microdosing Soccer Performance Speed

Age range

17 year–19 year

Sex eligibility

Male

Study type

Interventional

Phase

Not applicable

Primary location

Masaryk University

Brno, Czechia

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Active membership in a U19 elite soccer club during the intervention.
  • Medical fitness to participate in plyometric training and testing.
  • Attendance at ≥75% of training sessions.
  • Completion of all mandatory pre- and post-tests.
  • Previous experience with plyometric training and testing procedures.

Exclusion criteria

  • Medical limitations preventing safe participation in training or testing.
  • Attendance lower than 75% of scheduled intervention sessions.
  • Failure to complete mandatory baseline or follow-up testing.
  • Injury preventing completion of the intervention.

Treatment and study plan

Traditional group training program

Behavioral

This intervention consists of two supervised plyometric training sessions per week, each lasting about 40 minutes. It represents the traditional approach with fewer but longer sessions. The total weekly training volume is equivalent to the micro-dosed group but distributed differently.

Other names: Traditional Group, TRG

Micro-dosed group training program

Behavioral

This intervention consists of three to four shorter supervised plyometric sessions per week, each lasting about 20 minutes. It represents a micro-dosed approach, with higher frequency but shorter duration per session. The total weekly training volume is equivalent to the traditional group but distributed across more frequent sessions.

Other names: Micro-dose group, MDG

Primary outcomes

  1. Change in countermovement jump (CMJ) jump height

    Time frame: Baseline and after 8 weeks of intervention.

    Change in vertical jump height (cm) measured with dual force plates during a countermovement jump, from baseline (pre-test) to post-intervention (8 weeks).

  2. Change in Sprint Speed (30 m sprint test using 1080 Sprint system)

    Time frame: Baseline and after 8 weeks of intervention.

    Change in sprint velocity (m/s) and split times (0-5 m, 0-10 m, 0-30 m).

  3. Change in Drop Jump Reactive Strength Index (RSI)

    Time frame: Baseline and after 8 weeks.

    Change in reactive strength index (jump height / ground contact time) measured during drop jump from 30 cm platform.

Secondary outcomes

  1. Change in Standing Broad Jump Distance (SBJ)

    Time frame: Baseline and after 8 weeks.

    Change in Standing Broad Jump Distance (SBJ)

  2. Change in Sprint Mechanics (1080 Sprint)

    Time frame: Baseline and after 8 weeks.

    Change in peak force (N) and peak power (W) during 30 m sprint.

  3. Change in Change-of-Direction Performance (15-0-5 test)

    Time frame: Baseline and after 8 weeks.

    Change in time (s) to complete 15-0-5 change-of-direction test, including deceleration and re-acceleration phases.

Sponsors and collaborators

Lead sponsor

Matej Bel University

Other

Collaborators

  • Masaryk University

Registry information

Official study title

A Volume-Matched Quasi-Experimental Trial Comparing Micro-Dosed and Traditional Plyometric Training on Speed and Explosive Abilities in Elite Under-19 Soccer Players During the Pre-Season

Acronym: TRMD-PLYO_U19

Important dates

Study start
2024
Primary completion
2024
Study completion
2024
First posted
Sep 26, 2025
Registry last updated
Sep 26, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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