NCT07395414

Brief Summary

This randomized cross-over study measured physiological and perceptual responses of taekwondo athletes following a free combat and combats with different W:R ratios. This study was carried out with 4 visits. The first one included body composition measurements and familiarization to the sessions and measurements. During the rest 3 visit, athletes performed simulated combats free and with 1:2 (10 sec work and 20 sec rest), and 2:1 (20 sec work and 10 sec rest) W:R ratios. During all combat sessions, athletes heart rate (HR), blood lactate (bLA), and counter-movement jump performance (CMJ) were measured at rest and at the end of each combat. HR was also measured following each set. Athletes' rating of perceived exertion (RPE) and perceived muscle soreness (PMS) were measured immediately after each combat.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
20

participants targeted

Target at below P25 for not_applicable

Timeline
Completed

Started Mar 2023

Shorter than P25 for not_applicable

Geographic Reach
1 country

1 active site

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

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Study Timeline

Key milestones and dates

Study Start

First participant enrolled

March 5, 2023

Completed
1 month until next milestone

Primary Completion

Last participant's last visit for primary outcome

April 15, 2023

Completed
2 months until next milestone

Study Completion

Last participant's last visit for all outcomes

June 5, 2023

Completed
2.6 years until next milestone

First Submitted

Initial submission to the registry

January 24, 2026

Completed
16 days until next milestone

First Posted

Study publicly available on registry

February 9, 2026

Completed
Last Updated

February 9, 2026

Status Verified

January 1, 2026

Enrollment Period

1 month

First QC Date

January 24, 2026

Last Update Submit

January 31, 2026

Conditions

HIIT

Outcome Measures

Primary Outcomes (3)

  • Lactate

    Athletes' lactate levels immediately after the exercise

    Immediately after each intervention

  • Heart rate

    Athletes' heart rate responses

    Before and immediately after each intervention

  • CMJ

    Athletes' CMJ was measured before and after each exercise session.

    Before and immediately after each intervention

Secondary Outcomes (1)

  • RPE

    Immediately after each intervention

Study Arms (3)

Visit 1

EXPERIMENTAL
Other: Free combat

Visit 2

EXPERIMENTAL
Other: 1:2 work to rest ratio

Visit 3

EXPERIMENTAL
Other: 2:1 work to rest ratio

Interventions

Free combatOTHER

Athletes completed a taekwondo combat for 3 sets of 2 minutes

Visit 1
1:2 work to rest ratioOTHER

Athletes completed a taekwondo combat for 3 sets of 2 mins with 1:2 work to rest ratio (10 sec work and 20 sec rest)

Visit 2
2:1 work to rest ratioOTHER

Athletes completed a taekwondo combat for 3 sets of 2 minutes with 2:1 work to rest ratio (20 second work and 10 second rest)

Visit 3

Eligibility Criteria

Age18 Years - 26 Years
Sexmale
Healthy VolunteersYes
Age GroupsAdult (18-64)

You may qualify if:

  • having at least brown belt,
  • having at least 5 years of taekwondo experience,
  • having no injuries for the last 6 months that prevent participating to trainings,
  • competing at national championship and international tournaments during the last year

You may not qualify if:

  • not having a brown belt,
  • having less than 5 years of taekwondo experience,
  • having injuries for the last 6 months that prevent participating to trainings,
  • Not competing at national championship and international tournaments during the last year

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Kastamonu University Faculty of Sport Sciences Physiology Lab

Kastamonu, Turkey (Türkiye)

Location

Related Publications (2)

  • Bridge CA, Jones MA, and Drust B. Physiological responses and perceived exertion during international Taekwondo competition. International Journal of Sports Physiology And Performance 4: 485-493, 2009.

    BACKGROUND

  • Bouhlel E, Jouini A, Gmada N, Nefzi A, Ben Abdallah K, and Tabka Z. Heart rate and blood lactate responses during Taekwondo training and competition. Science & Sports 21: 285-290, 2006.

    BACKGROUND

Study Officials

  • Bayram Ceylan, PhD

    Kastamonu University

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
NONE
Purpose
OTHER
Intervention Model
CROSSOVER
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Assoc. Prof.

Study Record Dates

First Submitted

January 24, 2026

First Posted

February 9, 2026

Study Start

March 5, 2023

Primary Completion

April 15, 2023

Study Completion

June 5, 2023

Last Updated

February 9, 2026

Record last verified: 2026-01

Data Sharing

IPD Sharing
Will not share

Locations

TU(1)