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Priming Using Contrast Training Exercise

4 augustus 2026 bijgewerkt door: The Jerzy Kukuczka Academy of Physical Education in Katowice

Effects of Morning Contrast Training Exercise on the Afternoon Priming of Judoka's Athletic and Sport-specific Performance

This study investigated the effects of a morning complex-contrast training session on afternoon sport-specific and physical performance in competitive judokas. The study focused on identifying whether a stimulus targeting both force and velocity components of the force-velocity curve could induce a "delayed potentiation" effect 6 hours later and whether these responses differed by sex.

Studie Overzicht

Toestand

Voltooid

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

A randomized, counterbalanced crossover design was utilized to evaluate the efficacy of a morning priming protocol (using complex-contrast training exercises) compared to a control condition. Competitive male and female judo athletes performed a low-volume, high-intensity priming session consisting of heavy resistance and ballistic exercises in a set-by-set fashion. Physical performance was assessed using the Special Judo Fitness Test, handgrip strength, and countermovement jump height. Results were analyzed to determine the fatigue-potentiation balance over a 6-hour recovery window and to examine sex-based interactions in the priming response.

Studietype

Ingrijpend

Inschrijving (Werkelijk)

16

Fase

  • Niet toepasbaar

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studie Locaties

  • Polen
    • Silesian Voivodeship
      • Katowice, Silesian Voivodeship, Polen, 40-065
        • Academy of Physical Education in Katowice

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

  • Volwassen

Accepteert gezonde vrijwilligers

Ja

Beschrijving

Inclusion Criteria:

  • age between 18 and 22 years;
  • competitive male or female judo athlete;
  • minimum of 3 years of experience in structured judo training;
  • previous experience with and technical proficiency in resistance and ballistic training exercises;
  • ability to correctly perform the back squat, bench press, countermovement jump, and wall ball slam;
  • technical proficiency in performing the Ippon Seoi-Nage throwing technique; previous experience with the Special Judo Fitness Test;
  • absence of musculoskeletal injuries or medical conditions that would restrict participation in maximal physical exercise;
  • ability to complete both experimental conditions and all required performance assessments;
  • provision of written informed consent before participation.

Exclusion Criteria:

  • less than 3 years of structured judo training experience;
  • insufficient technical proficiency in the back squat, bench press, countermovement jump, or wall ball slam;
  • inability to correctly perform the Ippon Seoi-Nage technique;
  • no previous experience with the Special Judo Fitness Test;
  • current musculoskeletal pain or injury that could affect resistance exercise, jumping, handgrip assessment, or judo-specific performance;
  • presence of a medical condition that could restrict maximal physical effort or - make participation in the intervention unsafe;
  • inability to complete either experimental condition or the required testing procedures

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Fundamentele wetenschap
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Crossover-opdracht
  • Masker: Geen (open label)

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: Complex-Contrast Training Priming Condition

Participants performed a morning complex-contrast training (CCT) session designed to induce a delayed priming effect on afternoon judo-specific and neuromuscular performance. The session consisted of lower- and upper-body contrast exercise pairs combining heavy resistance exercises with biomechanically related ballistic exercises.

Following the intervention, participants completed a 6-hour passive recovery period before the afternoon performance assessment.
Gedragsmatig: Morning Complex-Contrast Training

At approximately 9:00 AM, participants completed a standardized warm-up consisting of a 10-minute self-paced jog followed by dynamic stretching. Baseline countermovement jump and maximum isometric handgrip strength measurements were subsequently performed.

The CCT intervention consisted of:

3 lower-body contrast sets, with 6 repetitions of the back squat paired with 6 maximal countermovement jumps; 3 upper-body contrast sets, with 6 repetitions of the bench press paired with 6 maximal wall ball slams.

After completing the morning session, participants underwent a 6-hour passive recovery period. At approximately 3:00 PM, they repeated the standardized warm-up and completed the countermovement jump, maximum isometric handgrip strength, and Special Judo Fitness Test assessments.
Actieve vergelijker: Time-Matched Walking Control Condition
Participants completed the same standardized morning warm-up and baseline measurements as in the experimental condition. Following the baseline measurements, participants walked for a period corresponding to the duration of the complex-contrast training protocol. No resistance or ballistic exercises were performed. After the walking period, participants underwent a 6-hour recovery interval before completing the afternoon performance assessments.
Gedragsmatig: Time-Matched Walking Control Condition

At approximately 9:00 AM, participants completed a standardized warm-up consisting of a 10-minute self-paced jog followed by dynamic stretching. Baseline countermovement jump and maximum isometric handgrip strength measurements were then performed.

Following the baseline measurements, participants walked for the duration required to complete the CCT protocol in the experimental condition. After the 6-hour recovery interval, participants returned at approximately 3:00 PM, repeated the standardized warm-up, and completed the countermovement jump, maximum isometric handgrip strength, and Special Judo Fitness Test assessments.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Special Judo Fitness Test Index
Tijdsspanne: Approximately 6 hours post-intervention

Judo-specific performance efficiency assessed using the Special Judo Fitness Test (SJFT). The test consisted of three work periods: one 15-second period followed by two 30-second periods, separated by 10-second recovery intervals.

During each period, the participant moved between two partners positioned 3 meters apart and performed the Ippon Seoi-Nage throwing technique as many times as possible. Heart rate was measured immediately after the test and 1 minute after test completion using a chest strap-based heart rate monitor.

The SJFT index was calculated using the total number of completed throws and the heart rate values recorded immediately and 1 minute after the test. A lower SJFT index represents better judo-specific performance efficiency.
Approximately 6 hours post-intervention

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Total Number of Throws During the Special Judo Fitness Test
Tijdsspanne: Approximately 6 hours post-intervention
The total number of successfully completed Ippon Seoi-Nage throws during all three periods of the Special Judo Fitness Test. The result was calculated as the sum of throws completed during the 15-second period and the two 30-second periods. A higher number of throws indicates better judo-specific performance.
Approximately 6 hours post-intervention
Number of Throws During Individual Special Judo Fitness Test Periods
Tijdsspanne: Approximately 6 hours post-intervention

The number of successfully completed Ippon Seoi-Nage throws was recorded separately during each of the three SJFT periods:

Set 1: 15 seconds; Set 2: 30 seconds; Set 3: 30 seconds.

The work periods were separated by 10-second recovery intervals. Results were reported as the number of completed throws in each set.
Approximately 6 hours post-intervention
Left-Hand Maximum Isometric Handgrip Strength
Tijdsspanne: Baseline and approximately 6 hours post-intervention

Maximum isometric handgrip strength of the left hand measured using a handheld Jamar dynamometer (Lafayette, California, USA).

Participants were seated upright with their feet flat on the floor, the upper arm positioned close to the torso, the elbow flexed to 90°, and the wrist maintained in a neutral position. During each trial, participants exerted maximal force against the dynamometer for 5 seconds. Attempts were alternated between the left and right hands, with a 1-minute recovery interval between trials.

Handgrip strength was reported in kilograms (kg).
Baseline and approximately 6 hours post-intervention
Right-Hand Maximum Isometric Handgrip Strength
Tijdsspanne: Baseline and approximately 6 hours post-intervention

Maximum isometric handgrip strength of the right hand measured using a handheld Jamar dynamometer (Lafayette, California, USA).

Participants were seated upright with their feet flat on the floor, the upper arm positioned close to the torso, the elbow flexed to 90°, and the wrist maintained in a neutral position. During each trial, participants exerted maximal force against the dynamometer for 5 seconds. Attempts were alternated between the left and right hands, with a 1-minute recovery interval between trials.

Handgrip strength was reported in kilograms (kg).
Baseline and approximately 6 hours post-intervention
Countermovement Jump Height
Tijdsspanne: Baseline and approximately 6 hours post-intervention

Vertical jump height measured during a countermovement jump using a portable force platform sampling at 2000 Hz.

Participants performed three maximal-effort countermovement jumps with their hands positioned on their hips and were allowed to use a self-selected countermovement depth. A 1-minute recovery interval was provided between trials. Jump height was reported in centimeters (cm).
Baseline and approximately 6 hours post-intervention
Heart Rate Immediately After the Special Judo Fitness Test
Tijdsspanne: Immediately after the Special Judo Fitness Test performed approximately 6 hours post-intervention
Heart rate measured immediately following completion of the Special Judo Fitness Test using a chest strap-based heart rate monitor. Heart rate was reported in beats per minute (bpm).
Immediately after the Special Judo Fitness Test performed approximately 6 hours post-intervention
Heart Rate One Minute After the Special Judo Fitness Test
Tijdsspanne: One minute after the Special Judo Fitness Test performed approximately 6 hours post-intervention
Heart rate measured 1 minute following completion of the Special Judo Fitness Test using a chest strap-based heart rate monitor. Heart rate was reported in beats per minute (bpm).
One minute after the Special Judo Fitness Test performed approximately 6 hours post-intervention

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

The Jerzy Kukuczka Academy of Physical Education in Katowice

Onderzoekers

  • Hoofdonderzoeker: Jakub Jarosz, PhD, Academy of Physical Education in Katowice

Publicaties en nuttige links

De persoon die verantwoordelijk is voor het invoeren van informatie over het onderzoek stelt deze publicaties vrijwillig ter beschikking. Dit kan gaan over alles wat met het onderzoek te maken heeft.

Algemene publicaties

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Werkelijk)

1 maart 2026

Primaire voltooiing (Werkelijk)

20 maart 2026

Studie voltooiing (Werkelijk)

10 april 2026

Studieregistratiedata

Eerst ingediend

4 augustus 2026

Eerst ingediend dat voldeed aan de QC-criteria

4 augustus 2026

Eerst geplaatst (Werkelijk)

10 augustus 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

10 augustus 2026

Laatste update ingediend die voldeed aan QC-criteria

4 augustus 2026

Laatst geverifieerd

1 augustus 2026

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Andere studie-ID-nummers

  • RRU/SPES/IRB/2025-26/16

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

JA

Beschrijving IPD-plan

De-identified individual participant data will be shared upon reasonable request after publication of the study results. Requests should be directed to the corresponding author.

IPD-tijdsbestek voor delen

Individual participant data and supporting documents will be available beginning 3 months after publication of the study results and ending 5 years following publication.

IPD-toegangscriteria voor delen

Researchers may request access to de-identified individual participant data by contacting the corresponding author. Data will be shared upon reasonable request for scientific research purposes.

IPD delen Ondersteunend informatietype

  • LEERPROTOCOOL
  • SAP

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

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