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Not yet recruitingNCT07933302SIMMATCH-NMUpdated Nov 12, 2026

Baseline Neuromuscular Performance and Responses to a Simulated Match in Young Athletes

An interventional study of Simulated Judo Match and Baseline Physical Performance Profiling in Neuromuscular Performance, Exercise-Induced Fatigue and Perceived Exertion, sponsored by Inonu University. Not yet recruiting at 1 site in Turkey (Türkiye). Open to male participants aged 10 Years to 13 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-11-12.

Sponsored by Inonu University · Not applicable, Interventional, and Basic science

Updated Nov 12, 2026Newly registeredGo to Updates ↓
Phase
Not applicable
Study type
Interventional
Enrollment
15
Allocation
Not applicable
Ages
10 Years to 13 Years
Sex
Male
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 333 studies in Fatigue with a site in Turkey — 50 open to participants now, 56 under way, none of them phase 3. Fatigue · Turkey.

Planned enrollment
245th of 253
15 · median 60
Started
2027
the only one that year
No phase
250 of 333
37 open now
Primary completion
2027-02
later than 50 of 55 live
Registered
330th of 333
by date
Lead sponsor
7 of 333
Inonu University

Among the 333 studies in Fatigue with a site in Turkey, this one is the 245th largest by planned enrollment of the 253 interventional ones that give a count, is the only one that started in 2027, is one of 250 with no phase, reaches primary completion later than 50 of the 55 other live ones, and was the 330th registered.

Fatigue

2,232 studies on the registry are indexed under Fatigue; 428 are open to participants now.

Browse Fatigue studies →

Open to participants now

50 of the 333 studies in Fatigue with a site in Turkey are open now. Recruiting first, the newest first:

45 more — sign in →

All 50 open studies →

A study can be open while its sites in Turkey have not opened yet or have stopped. Only those recruiting at a site in Turkey →

Who these studies take

Of the 240 Fatigue studies recruiting now, 111 (46%) set no upper age limit and 99 (41%) stop at 75 or younger; 23 take children under 18; 73 take healthy volunteers.

This study: 10 Years to 13 Years · male · healthy volunteers too.

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02

Study summary

This study looks at whether the physical fitness of young judo athletes before a match can help predict how their bodies and effort perception respond after a match. Judo matches are short, intense and tiring. After a match, athletes show higher blood lactate (a marker of intense effort), weaker grip strength and lower jump height. Not much is known about whether baseline tests of core endurance, throwing power, speed, agility and force-velocity profile can predict these changes in young athletes. Male judo athletes aged 10-13 years will complete these baseline tests in one session and then take part in one 3-minute simulated judo match with a training partner of similar body mass. Blood lactate, vertical jump height and grip strength will be measured before and right after the match, and athletes will rate how hard the match felt. The study will examine how the changes after the match relate to the baseline test results. The findings may help coaches monitor training load and plan conditioning for young judo athletes.

Read the detailed description

Judo is a high-intensity intermittent combat sport. Matches produce marked blood lactate accumulation, loss of handgrip strength, and reduced lower-body power. Baseline physical profiling is widely used to monitor athletic development, but its ability to predict individual physiological and perceptual responses to a judo match in young athletes is not well understood.

This is a single-group, pre-post study. Fifteen male judo athletes aged 10-13 years will be recruited in Malatya, Turkey. Written informed consent will be obtained from parents or legal guardians, and assent from participants. About one week before testing, participants are familiarized with the procedures and the Borg 6-20 rating of perceived exertion (RPE) scale. Participants avoid high-intensity training, caffeine and ergogenic supplements for 48 hours before testing. Testing takes place in a climate-controlled hall (20-22 °C).

Test day: After anthropometric measurements, baseline profiling is performed: McGill core endurance tests (trunk flexion, trunk extension, right and left lateral bridge), a 2-kg backward overhead medicine ball throw, a 20-m sprint, the pro-agility test, and a force-velocity profile using Samozino's field method (MyJump2 app, 240 fps video). After a standardized 10-minute warm-up (low-intensity jogging, dynamic stretching, breakfalls), pre-match measures are taken: blood lactate (finger-prick capillary sample, single-use lancet), countermovement jump height (contact mat) and handgrip strength (hand dynamometer).

Athletes then complete one 3-minute simulated judo match (randori) under International Judo Federation rules with a training partner of similar body mass (±5 kg), supervised by a coach. Immediately afterwards, blood lactate, jump height, grip strength and RPE are measured in this order within about 3 minutes.

Pre- and post-match values are compared with paired-samples t-tests (Cohen's d). Change scores (post minus pre) for lactate, jump height and grip strength, and RPE, are related to baseline variables using Pearson correlation and simple linear regression. The sample size (minimum 15) was calculated with G*Power for a paired t-test (d = 0.80, alpha = 0.05, power = 0.80).

03

Conditions studied

  • Neuromuscular Performance
  • Exercise-Induced Fatigue
  • Perceived Exertion

Browse trials for

Keywords

  • judo
  • young athletes
  • simulated match
  • blood lactate
  • perceived exertion
  • handgrip strength
  • countermovement jump
  • core endurance
04

Who can participate

Ages eligible
10 Years to 13 Years
Sexes eligible
Male
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Actively competing judo athlete in Malatya, Turkey
  • Male, aged 10-13 years
  • At least 2 years of regular judo training and competition experience
  • At least four structured technical-tactical training sessions per week
  • No limiting musculoskeletal injury in the last 6 months
  • No musculoskeletal, cardiometabolic, or neurological condition that could prevent testing
  • Willing to participate in all planned tests
  • Written signed by parent or legal guardian, and assent from the participant

Exclusion criteria

Exclusion Criteria:

  • Younger than 10 or older than 13 years
  • Musculoskeletal injury or surgery within the last 6 months
  • Musculoskeletal, cardiometabolic, or neurological condition that could prevent testing
  • Open wound, varicose veins, acute inflammation, or history of thrombosis
  • Regular use of analgesic or anti-inflammatory medication or ergogenic supplements in the last 3 months
  • Unable to attend all planned testing sessions
  • Unwilling to follow the pre-test rules (no high-intensity training, caffeine or ergogenic supplements for 48 hours; usual diet, hydration and rest)
  • Withdrawal during the study due to non-compliance, incomplete sessions, acute injury during the simulated match, serious illness, or participant request
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

05

Study design

Phase
Not applicable
Primary purpose
Basic science
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
15 participants (estimated)

Study arms

  • Experimental
    Young Judo Athletes

    Male judo athletes aged 10-13 years complete baseline physical profiling, followed by one standardized 3-minute simulated judo match. Blood lactate, jump height, grip strength and perceived exertion are measured before and immediately after the match.

    Other: Simulated Judo Match · Diagnostic Test: Baseline Physical Performance Profiling

Interventions

  • OtherSimulated Judo Match

    One 3-minute simulated judo match (randori) performed under International Judo Federation rules against a training partner of similar body mass (±5 kg), supervised by a coach. Athletes are instructed to fight at maximal competitive intensity.

    Also known as: Randori

  • Diagnostic testBaseline Physical Performance Profiling

    McGill core endurance tests, 2-kg backward overhead medicine ball throw, 20-m sprint, pro-agility test and force-velocity profile (Samozino's field method). Followed by pre- and post-match measures of blood lactate, countermovement jump height, handgrip strength and rating of perceived exertion.

06

What researchers measure

Primary outcomes

  1. Change in Blood Lactate Concentration After a Simulated Judo Match

    Change (post-match minus pre-match) in capillary blood lactate concentration (mmol/L), measured from a finger-prick sample with a portable lactate analyzer. The relationship of this change with baseline physical performance variables is also analyzed.

    Time frame: Immediately before and within 3 minutes after the simulated match (single test session)

  2. Change in Countermovement Jump Height After a Simulated Judo Match

    Change (post-match minus pre-match) in maximal isometric handgrip strength (kg) of the dominant hand, measured with a hand dynamometer (best of two trials).

    Time frame: Immediately before and within 3 minutes after the simulated match (single test session)

Secondary outcomes

  1. Rating of Perceived Exertion (RPE) After a Simulated Judo Match

    Perceived effort of the simulated match rated on the Borg 6-20 RPE scale (6 = no exertion, 20 = maximal exertion).

    Time frame: Within 30 seconds after the simulated match (single test session)

  2. Change in Handgrip Strength After a Simulated Judo Match

    Change (post-match minus pre-match) in maximal isometric handgrip strength (kg) of the dominant hand, measured with a hand dynamometer (best of two trials).

    Time frame: Immediately before and within 3 minutes after the simulated match (single test session)

07

Study locations

1 site
08

References and documents

Publications

  • Samozino P, Rejc E, Di Prampero PE, Belli A, Morin JB. Optimal force-velocity profile in ballistic movements--altius: citius or fortius? Med Sci Sports Exerc. 2012 Feb;44(2):313-22. doi: 10.1249/MSS.0b013e31822d757a. PubMed 21775909 ↗
  • McGill SM, Childs A, Liebenson C. Endurance times for low back stabilization exercises: clinical targets for testing and training from a normal database. Arch Phys Med Rehabil. 1999 Aug;80(8):941-4. doi: 10.1016/s0003-9993(99)90087-4. PubMed 10453772 ↗
  • Franchini E, Del Vecchio FB, Matsushigue KA, Artioli GG. Physiological profiles of elite judo athletes. Sports Med. 2011 Feb 1;41(2):147-66. doi: 10.2165/11538580-000000000-00000. PubMed 21244106 ↗

Individual participant data

Plan to share: No — Individual participant data will not be shared, because participants are minors and the consent forms state that data will be used only for the purposes of this research and kept confidential. Aggregate results will be published.

09

Timeline

1 registry update since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Start is estimated for Jan 2027; primary completion for Feb 2027, 1 month later.

Of 936 non-industry interventional studies with no phase under Fatigue, half reached primary completion within 12 months of starting (the median), counting those still running; a quarter within 5 and three quarters within 27. This study's planned 1 month is below that.

Counting every sponsor, half of 989 studies reached it within 11 months; a quarter within 5 and three quarters within 27.

How these figures are worked out, and which studies are left out of them.

Registered
Nov 2, 2026
First posted
Nov 12, 2026
StartEst.
Jan 11, 2027
Primary completionEst.
Feb 11, 2027
CompletionEst.
Feb 11, 2027
Last update
Nov 12, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
Registered
First appeared on the registry. No changes since
Nov 12, 2026
Show all 1 update
  1. Nov 12, 2026
    First appeared on the registry

From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗

10

Registry details

Key details

Study ID
NCT07933302
Lead sponsor
Inonu University
Responsible party
Assoc. Prof. Dr. Özgür EKEN (Associate Professor, Inonu University) — Principal investigator
First posted
Nov 12, 2026
Start date
Jan 11, 2027 (estimated)
Primary completion
Feb 11, 2027 (estimated)
Completion
Feb 11, 2027 (estimated)
Last update
Nov 12, 2026

Study contacts

Özgür Eken, PhD, Associate Professor
Contact
ozgur.eken@inonu.edu.tr
+90 553 213 27 95
Denizhan Çalışkan, Dr.
Contact
denizhancaliskann@gmail.com
+90 539 879 64 59
Özgür Eken, PhD, Assoc. Prof.
principal investigator · Inonu University, Faculty of Sport Sciences
Denizhan Caliskan
study director · Eskisehir Provincial Directorate of Youth and Sports, Eskisehir, Türkiye

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is not yet recruiting, as verified in Nov 2026. You cannot join it, but the record below documents what was studied.

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