Taekwondo Match-simulated FatigueNCT07747064
Effects of Taekwondo Match-Simulated Fatigue on Balance Performance in Female Athletes
A study testing Taekwondo Match-Simulated Fatigue Protocol, Static balance test and Dynamic balance test in people with Taekwondo Match-simulated Fatigue and Static Balance, run by Berkay Löklüoğlu at 1 site in Turkey (Türkiye).
Trial summary
Taekwondo is a high-intensity combat sport characterized by repeated explosive kicking actions and rapid changes in body position, requiring well-developed postural control to maintain technical performance and reduce injury risk. Read more about this study
- Who is it for?
- Ages 18 to 20 years, women onlyHealthy volunteers can take part
- Conditions the study is for
- Taekwondo Match-simulated Fatigue, Static Balance, Dinamic Balance
- What is being tested?
- Taekwondo Match-Simulated Fatigue Protocol, Static balance test and Dynamic balance test
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 20 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 1 Jun 2026to 1 Aug 2026
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 20 years
- Women only
- Healthy volunteers accepted
- Adult
Who may be able to join
- Female taekwondo athletes aged 18-20 years.
- Regular participation in taekwondo training (minimum 3 sessions per week).
- Minimum of 3 years of competitive taekwondo experience.
- Free from musculoskeletal injury at the time of testing.
- Willingness to provide written informed consent
Who cannot join
- Any musculoskeletal injury within the previous 6 months.
- Neurological, vestibular, or balance disorders.
- Lower-extremity surgery within the previous 12 months.
- Any medical condition preventing participation in maximal exercise.
- Failure to complete the testing protocol
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Effects of Taekwondo Match-Simulated Fatigue on Static and Dynamic Balance Performance in Female Athletes
Taekwondo is a high-intensity combat sport characterized by repeated explosive kicking actions and rapid changes in body position, requiring well-developed postural control to maintain technical performance and reduce injury risk. Although fatigue has been reported to impair balance performance, previous studies have primarily induced fatigue using non-specific laboratory protocols that do not adequately reflect the physiological and neuromuscular demands of taekwondo competition. Consequently, the effects of taekwondo-specific fatigue on static and dynamic balance performance remain insufficiently understood. The primary objective of this study will be to investigate the effects of a taekwondo match-simulated fatigue protocol on static and dynamic balance performance in female taekwondo athletes. Eighteen competitive female taekwondo athletes will participate in this single-group repeated-measures study. Following a familiarization session, participants will complete a standardized taekwondo match-simulated fatigue protocol consisting of three 2-minute rounds separated by 1-minute passive recovery periods, replicating the official Olympic competition format. Static and dynamic balance performance will be assessed before and immediately after the fatigue protocol using the Biodex Balance System (Biodex Medical Systems Inc., Shirley, NY, USA). Balance performance will be evaluated under static and dynamic testing conditions, and the Overall Stability Index, Anteroposterior Stability Index, and Mediolateral Stability Index will be recorded. The findings of this study are expected to improve understanding of the acute effects of sport-specific fatigue on postural control in female taekwondo athletes and may contribute to the development of evidence-based training and injury prevention strategies.
- Conditions
- Taekwondo Match-simulated Fatigue, Static Balance, Dinamic Balance, Female Athletes, Postural Balance, Fatigue
- Being tested
- Taekwondo Match-Simulated Fatigue Protocol, Static balance test, Dynamic balance test
- Medical subject headings
- Fatigue
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Taekwondo Match-Simulated Fatigue ProtocolBehavioural
Participants will perform a standardized taekwondo match-simulated fatigue protocol designed to reproduce the physiological and neuromuscular demands of an official taekwondo match. Static and dynamic balance performance will be evaluated immediately before and after completion of the protocol.
Static balance testBehavioural
Static balance performance will be assessed using the Biodex Balance System (Biodex Medical Systems Inc., Shirley, NY, USA). Mean Overall Stability Index (OSI) score, mean Anteroposterior Stability Index (APSI) score, and mean Mediolateral Stability Index (MLSI) score will be calculated automatically by the system. The static balance condition will be combined with an eyes-closed stance with the platform locked at a static level (a fixed support); this condition will designed to reflect support-fixed, vision-deprived postural control, where the participant must maintain postural stability without visual cues on a stable surface.
Dynamic balance testBehavioural
Dynamic balance performance will be assessed using the Biodex Balance System (Biodex Medical Systems Inc., Shirley, NY, USA). Mean Overall Stability Index (OSI) score, mean Anteroposterior Stability Index (APSI) score, and mean Mediolateral Stability Index (MLSI) score will be calculated automatically by the system. The dynamic balance condition combines an eyes-open stance with the platform stability set to level 5 (an unstable platform that requires active postural adjustments). This condition will be designed to reflect visually guided, mechanically unstable postural control, where the participant must rely on real-time visual feedback to compensate for continuous platform tilt.
| Study group | Role | What they receive |
|---|---|---|
| Experimental research design | Experimental | Female taekwondo athletes will complete a standardized taekwondo match-simulated fatigue protocol. Static and dynamic balance performance will be assessed immediately before and after the fatigue protocol during a single experimental session. Receives: Behavioral: Taekwondo Match-Simulated Fatigue Protocol; Behavioral: Static balance test; Behavioral: Dynamic balance test |
What is being measured
The primary outcome is the main question the study is designed to answer.
Mean Overall Stability Index (OSI) Score
The Mean Overall Stability Index Score is the arithmetic mean of Overall Stability Index values automatically calculated by the Biodex system at the end of each 20-second single-leg stance trial. This index is a unitless score representing the standard deviation of platform tilt about both the anteroposterior and mediolateral axes combined; it reflects composite postural sway during the trial. Each participant completed the trial barefoot on her dominant lower extremity, under two within-subject conditions: (i) dynamic balance (eyes-open stance with the Biodex platform stability set to level 5), and (ii) static balance (eyes-closed stance with the platform locked at a static level). The index is a unitless score representing the standard deviation of platform tilt about the corresponding axis; the theoretical minimum score is 0, which represents perfect postural stability. There is no fixed theoretical upper limit of these indices. Higher scores indicate poorer balance performance.
Measured: Baseline and immediately after the taekwondo match-simulated fatigue protocol.
Mean Mediolateral Stability Index (MLSI) Score
The Mean Mediolateral Stability Index Score is the arithmetic mean of Mediolateral Stability Index values automatically calculated by the Biodex Balance System at the end of each 20-second single-leg stance trial. This index is a unitless score representing the standard deviation of platform tilt about the frontal axis only; it reflects mediolateral sway and is associated with hip-abductor-driven postural control. Each participant will complete the trial barefoot on her dominant lower extremity (the foot preferred for kicking a ball) under two within-subject conditions: (i) dynamic balance (eyes-open stance with the Biodex platform stability set to level 5), and (ii) static balance (eyes-closed stance with the platform locked at a static level). Theoretically, this index has a minimum value of 0, which represents perfect postural stability; there is no fixed theoretical upper limit. Higher scores indicate poorer balance performance.
Measured: Baseline and immediately after the taekwondo match-simulated fatigue protocol.
Mean Anterior-Posterior Stability Index (APSI) Score
The Mean Anterior-Posterior Stability Index Score is the arithmetic mean of Anterior-Posterior Stability Index values automatically calculated by the Biodex system at the end of each 20-second single-leg stance trial. This index is a unitless score representing the standard deviation of platform tilt about the sagittal axis only; it reflects anteroposterior sway and is associated with the ankle strategy of postural control. Each participant will complete the trial barefoot on her dominant lower extremity (the foot preferred for kicking a ball) under two within-subject conditions: (i) dynamic balance (eyes-open stance with the Biodex platform stability set to level 5), and (ii) static balance (eyes-closed stance with the platform locked at a static level). Theoretically, this index has a minimum value of 0, which represents perfect postural stability; there is no fixed theoretical upper limit. Higher scores indicate poorer balance performance.
Measured: Baseline and immediately after the taekwondo match-simulated fatigue protocol.
Secondary outcomes (2)
Mean Age
The mean chronological age of participants at the time of enrollment will be reported in years. Age will be derived from each participant's official identification date of birth and the calendar date of the first balance testing session. It will be used solely as a descriptive baseline demographic variable.
Measured: Only baseline.
Mean Body Mass Index
Mean Body Mass Index is the arithmetic mean of participant-level BMI values aggregated from body mass (kg) and height (m) according to the standard formula BMI = body mass (kg) / height² (m²). Body mass will be measured in kilograms and standing height in centimeters by a single trained experimenter during the enrollment session. Each participant-level BMI is therefore a single aggregated value derived from two distinct unit-of-measure measurements; height (centimeters) and body mass (kilograms) are not reported separately. It will be used solely as a descriptive baseline demographic variable.
Measured: Only baseline.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted5 Aug 2026
- Study start1 Jun 2026
- Primary completion1 Jul 2026
- Study completion1 Aug 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Taekwondo Match-simulated FatigueStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Basic science
- Allocation
- Not applicable
- Intervention model
- Single group
- Model description
- All participants will complete the same taekwondo match-simulated fatigue protocol. Static and dynamic balance performance will be assessed before and immediately after the fatigue protocol within a single experimental session.
- Masking
- None (open label)
- Enrolment
- 20 participants (actual)
Sponsor and investigators
- Lead sponsor
- Berkay Löklüoğlu
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor-investigator, Berkay Löklüoğlu, Mustafa Kemal University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07747064
- Sponsor's protocol ID
- 279
- Status last verified
- Aug 2026
- First submitted
- 25 Jul 2026
- Last updated
- 17 Sep 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 17 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effects of Taekwondo Match-Simulated Fatigue on Static and Dynamic Balance Performance in Female Athletes
- ClinicalTrials.gov ID
- NCT07747064
- Acronym / sponsor ID
- 279
- Conditions
- Taekwondo Match-simulated Fatigue, Static Balance, Dinamic Balance, Female Athletes, Postural Balance, Fatigue
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 20 participants (actual)
- Lead sponsor
- Berkay LöklüoğluUniversity, hospital or other
- Study start
- 1 Jun 2026 (actual)
- Primary completion
- 1 Jul 2026 (actual)
- Study completion
- 1 Aug 2026 (actual)
- First posted
- 5 Aug 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Taekwondo is a high-intensity combat sport characterized by repeated explosive kicking actions and rapid changes in body position, requiring well-developed postural control to maintain technical performance and reduce injury risk. Although fatigue has been reported to impair balance performance, previous studies have primarily induced fatigue using non-specific laboratory protocols that do not adequately reflect the physiological and neuromuscular demands of taekwondo competition. Consequently, the effects of taekwondo-specific fatigue on static and dynamic balance performance remain insufficiently understood. The primary objective of this study will be to investigate the effects of a taekwondo match-simulated fatigue protocol on static and dynamic balance performance in female taekwondo athletes. Eighteen competitive female taekwondo athletes will participate in this single-group repeated-measures study. Following a familiarization session, participants will complete a standardized taekwondo match-simulated fatigue protocol consisting of three 2-minute rounds separated by 1-minute passive recovery periods, replicating the official Olympic competition format. Static and dynamic balance performance will be assessed before and immediately after the fatigue protocol using the Biodex Balance System (Biodex Medical Systems Inc., Shirley, NY, USA). Balance performance will be evaluated under static and dynamic testing conditions, and the Overall Stability Index, Anteroposterior Stability Index, and Mediolateral Stability Index will be recorded. The findings of this study are expected to improve understanding of the acute effects of sport-specific fatigue on postural control in female taekwondo athletes and may contribute to the development of evidence-based training and injury prevention strategies.
Study design
- Primary purpose
- Basic science
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
- Model description
- All participants will complete the same taekwondo match-simulated fatigue protocol. Static and dynamic balance performance will be assessed before and immediately after the fatigue protocol within a single experimental session.
| Arm | Type | Receives |
|---|---|---|
| Experimental research design | Experimental | Behavioral: Taekwondo Match-Simulated Fatigue Protocol, Behavioral: Static balance test, Behavioral: Dynamic balance testFemale taekwondo athletes will complete a standardized taekwondo match-simulated fatigue protocol. Static and dynamic balance performance will be assessed immediately before and after the fatigue protocol during a single experimental session. |
Who may qualify
- Ages
- 18 to 20 years
- Sex
- Female only
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (5 listed)
- Female taekwondo athletes aged 18-20 years.
- Regular participation in taekwondo training (minimum 3 sessions per week).
- Minimum of 3 years of competitive taekwondo experience.
- Free from musculoskeletal injury at the time of testing.
- Willingness to provide written informed consent
Key exclusion criteria (5 listed)
- Any musculoskeletal injury within the previous 6 months.
- Neurological, vestibular, or balance disorders.
- Lower-extremity surgery within the previous 12 months.
- Any medical condition preventing participation in maximal exercise.
- Failure to complete the testing protocol
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Taekwondo Match-Simulated Fatigue ProtocolParticipants will perform a standardized taekwondo match-simulated fatigue protocol designed to reproduce the physiological and neuromuscular demands of an official taekwondo match. Static and dynamic balance performance will be evaluated immediately before and after completion of the protocol. | Behavioural | Experimental research design |
| Static balance testStatic balance performance will be assessed using the Biodex Balance System (Biodex Medical Systems Inc., Shirley, NY, USA). Mean Overall Stability Index (OSI) score, mean Anteroposterior Stability Index (APSI) score, and mean Mediolateral Stability Index (MLSI) score will be calculated automatically by the system. The static balance condition will be combined with an eyes-closed stance with the platform locked at a static level (a fixed support); this condition will designed to reflect support-fixed, vision-deprived postural control, where the participant must maintain postural stability without visual cues on a stable surface. | Behavioural | Experimental research design |
| Dynamic balance testDynamic balance performance will be assessed using the Biodex Balance System (Biodex Medical Systems Inc., Shirley, NY, USA). Mean Overall Stability Index (OSI) score, mean Anteroposterior Stability Index (APSI) score, and mean Mediolateral Stability Index (MLSI) score will be calculated automatically by the system. The dynamic balance condition combines an eyes-open stance with the platform stability set to level 5 (an unstable platform that requires active postural adjustments). This condition will be designed to reflect visually guided, mechanically unstable postural control, where the participant must rely on real-time visual feedback to compensate for continuous platform tilt. | Behavioural | Experimental research design |
Primary outcome
Mean Overall Stability Index (OSI) Score
Time frame: Baseline and immediately after the taekwondo match-simulated fatigue protocol.
The Mean Overall Stability Index Score is the arithmetic mean of Overall Stability Index values automatically calculated by the Biodex system at the end of each 20-second single-leg stance trial. This index is a unitless score representing the standard deviation of platform tilt about both the anteroposterior and mediolateral axes combined; it reflects composite postural sway during the trial. Each participant completed the trial barefoot on her dominant lower extremity, under two within-subject conditions: (i) dynamic balance (eyes-open stance with the Biodex platform stability set to level 5), and (ii) static balance (eyes-closed stance with the platform locked at a static level). The index is a unitless score representing the standard deviation of platform tilt about the corresponding axis; the theoretical minimum score is 0, which represents perfect postural stability. There is no fixed theoretical upper limit of these indices. Higher scores indicate poorer balance performance.
Mean Mediolateral Stability Index (MLSI) Score
Time frame: Baseline and immediately after the taekwondo match-simulated fatigue protocol.
The Mean Mediolateral Stability Index Score is the arithmetic mean of Mediolateral Stability Index values automatically calculated by the Biodex Balance System at the end of each 20-second single-leg stance trial. This index is a unitless score representing the standard deviation of platform tilt about the frontal axis only; it reflects mediolateral sway and is associated with hip-abductor-driven postural control. Each participant will complete the trial barefoot on her dominant lower extremity (the foot preferred for kicking a ball) under two within-subject conditions: (i) dynamic balance (eyes-open stance with the Biodex platform stability set to level 5), and (ii) static balance (eyes-closed stance with the platform locked at a static level). Theoretically, this index has a minimum value of 0, which represents perfect postural stability; there is no fixed theoretical upper limit. Higher scores indicate poorer balance performance.
Mean Anterior-Posterior Stability Index (APSI) Score
Time frame: Baseline and immediately after the taekwondo match-simulated fatigue protocol.
The Mean Anterior-Posterior Stability Index Score is the arithmetic mean of Anterior-Posterior Stability Index values automatically calculated by the Biodex system at the end of each 20-second single-leg stance trial. This index is a unitless score representing the standard deviation of platform tilt about the sagittal axis only; it reflects anteroposterior sway and is associated with the ankle strategy of postural control. Each participant will complete the trial barefoot on her dominant lower extremity (the foot preferred for kicking a ball) under two within-subject conditions: (i) dynamic balance (eyes-open stance with the Biodex platform stability set to level 5), and (ii) static balance (eyes-closed stance with the platform locked at a static level). Theoretically, this index has a minimum value of 0, which represents perfect postural stability; there is no fixed theoretical upper limit. Higher scores indicate poorer balance performance.
2 secondary outcomes
Mean Age
Time frame: Only baseline.
Mean Body Mass Index
Time frame: Only baseline.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 17 Sep 2026.
- Individual participant dataSharing planned: No
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Taekwondo Match-Simulated Fatigue Protocol, Static balance test and Dynamic balance test in people with Taekwondo Match-simulated Fatigue and Static Balance, run by Berkay Löklüoğlu at 1 site in Turkey (Türkiye).
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 17 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Mean Overall Stability Index (OSI) Score (time frame: Baseline and immediately after the taekwondo match-simulated fatigue protocol.). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 17 Sep 2026.