Core StabilizationNCT06728267
Core Stabilization Training in Child and Adolescent Underwater Rugby Athletes
A study testing Core stabilization training and Training in people with Core Stabilization and Trunk Muscle Endurance, run by Ozden Gokcek at 1 site in Turkey (Türkiye).
Trial summary
Demographic information of children aged 9-17 who volunteer to participate in the study and who play underwater rugby will be recorded, and all participants; respiratory function will be assessed with a portable spirometer (Cosmed Poni FX) device, respiratory muscle strength will be assessed with a portable (micro RPM… Read more about this study
- Who is it for?
- Ages 9 to 18 yearsHealthy volunteers can take part
- Conditions the study is for
- Core Stabilization, Trunk Muscle Endurance, Respiratory Function
- What is being tested?
- Core stabilization training and Training
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 30 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 9 Dec 2024to 9 Sep 2025
- 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 9 to 18 years
- All sexes
- Healthy volunteers accepted
- Child, Adult
Who may be able to join
- Doing underwater rugby.
- No mental problems.
- Able to cooperate.
Who cannot join
- Diagnosed with respiratory system disease.
- Kyphoscoliosis and/or advanced postural alignment problems that will affect respiratory function.
- Any orthopedic and neurological problems.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Effects of Core Stabilization Training on Trunk Muscle Endurance, Respiratory Function and Quality of Life in Child and Adolescent Underwater Rugby Athletes
Demographic information of children aged 9-17 who volunteer to participate in the study and who play underwater rugby will be recorded, and all participants; respiratory function will be assessed with a portable spirometer (Cosmed Poni FX) device, respiratory muscle strength will be assessed with a portable (micro RPM brand) electronic mouth pressure measurement device, and quality of life will be assessed with the KIDSCREEN scale. Core muscle endurance will be assessed with trunk flexion, trunk extension, lateral plank tests and flat plank test developed by McGill.
Respiratory muscle strength will be measured according to ATS/ERS criteria using a portable electronic mouth pressure measurement device (micro RPM brand). Respiratory function test will be performed using a portable spirometer (Cosmed Pony FX) to assess respiratory function. Capillary blood oxygen saturation of children will be recorded according to pulse oximetry results. Blood pressure will be measured with a cuff of appropriate size after a 5-minute rest according to age, gender and height percentile.
The experimental group will receive core stabilization training in addition to the training process. This training; Exercise training will be provided for 6 weeks, 3 days a week, 2 sets of 10 repetitions for the first two weeks, 2 sets of 15 repetitions for the second two weeks, and 3 sets of 12 repetitions for the third two weeks (Rahmat, et al., 2014). MIP/MEP values will be evaluated once a week. The control group will be monitored during the training and no training program will be given. The exercise program will be applied at the end of the project by being included in the follow-up list. The children will be taken to the second evaluation 6 weeks after the first evaluation.
- Being tested
- Core stabilization training, Training
- Medical subject headings
- Respiratory Aspiration
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Core stabilization trainingOther
Exercise training will be given for 6 weeks, 3 days a week, 2 sets of 10 repetitions for the first two weeks, 2 sets of 15 repetitions for the second two weeks, and 3 sets of 12 repetitions for the third two weeks.
TrainingOther
Routine training sessions conducted by coaches specific to the sport of underwater rugby.
| Study group | Role | What they receive |
|---|---|---|
| Experimental Group | Experimental | The experimental group will receive core stabilization training in addition to the training process. This training will be given for 6 weeks, 3 days a week, with 2 sets of 10 repetitions for the first two weeks, 2 sets of 15 repetitions for the second two weeks, and 3 sets of 12 repetitions for the third two weeks. Receives: Other: Core stabilization training; Other: Training |
| Control Group | Active comparator | The control group will be monitored throughout the training period and will not be given any training program. Receives: Other: Training |
What is being measured
The primary outcome is the main question the study is designed to answer.
Trunk Extension Test
The time it takes to remain in a face down position on a stretcher, with ankles and knees fixed on the stretcher, the body outside the edge of the stretcher and 25 cm above the ground, with hands crossed in front, holding the shoulders without changing position, will be recorded in seconds.
Measured: At the beginning and at the end of 6 weeks of exercise.
Trunk Flexion Test
The time spent in sit-up position on the floor mat, with the trunk upright at a 60-degree angle, knees and hips in a 90-degree flexion position, feet supported by the assistant and fixed on the ground, hands crossed on the chest, without changing position will be recorded in seconds.
Measured: At the beginning and at the end of 6 weeks of exercise.
Lateral Plank Test
The time spent in the lateral plank position, with one foot supported on the other, straight along the body length, hips up, one elbow supporting the ground, the other holding the crossed shoulder in front, without changing position will be recorded in seconds.
Measured: At the beginning and at the end of 6 weeks of exercise.
Straight Plank Test
The time it takes to remain in the push-up position, with the fingertips on the ground, the elbows bent and touching the ground, and the hips up without changing position will be recorded in seconds.
Measured: At the beginning and at the end of 6 weeks of exercise.
Muscle Strength
According to the muscle test method found by Dr. Lovett, the muscle strength test is performed by scoring 0-5. Abdominal muscles, oblique trunk flexors and back extensors will be tested for muscle strength. Two separate tests will be performed for the lower and upper parts of the abdominal muscles.
Measured: At the beginning and at the end of 6 weeks of exercise.
Evaluation of the Stabilizing Function of the Transversus Abdominis Muscle
Abdominal muscle activity was measured using the pressure biofeedback unit (PBU) during abdominal inhalation maneuver in the prone position and during posterior pelvic tilt movement in the supine position. Transversus abdominis muscle activity is assessed using the PBU with abdominal inhalation maneuver in the prone position. The cuff of the BBU is placed between the midpoint of the line connecting both spina iliaca anterior superiors of the participant and the umbilical cord. The participant is asked to breathe comfortably abdominally. The valve of the manometer is closed and the cuff is inflated to a pressure of 70 mmHg. All participants are given the standard command of "pull your abdomen in without moving your spine and hips and wait 10 seconds". The amount of pressure decrease in the manometer is recorded. The measurement will be repeated 3 times with 2-minute rest periods to prevent possible muscle fatigue and the average will be taken.
Measured: At the beginning and at the end of 6 weeks of exercise.
Respiratory Muscle Strength
Respiratory muscle strength will be measured using a portable electronic mouth pressure measuring device (micro RPM brand) according to ATS/ERS criteria. Maximal inspiratory pressure (MIP) will be measured at residual volume and during deep inspiration. Maximal expiratory pressure (MEP) will be measured at total lung capacity and during deep expiration. Tests will be performed in the sitting position using a nose clip. Inspiratory and expiratory muscle strength values will be expressed as a percentage of the expected value.
Measured: At the beginning and at the end of 6 weeks of exercise.
Respiratory Function Test
Respiratory function test will be performed using a portable spirometer (Cosmed Pony FX). The test will be performed in a sitting position, with the patient first asked to take a deep breath and then exhale quickly through the spirometer. A nose clip will be used during exhalation. Forced vital capacity (FVC), forced expiratory volume in one second (FEV1), FEV1/FVC will be recorded. Respiratory function test parameters will be expressed as a percentage of expected values according to age, height, body weight and sex.
Measured: At the beginning and at the end of 6 weeks of exercise.
Saturation
Capillary blood oxygen saturation will be determined by pulse oximetry.
Measured: At the beginning and at the end of 6 weeks of exercise.
Blood Pressure
ssessment of blood pressure is important to detect hypertension or hypovolemic shock. A blood pressure value in the 50th percentile for a child's age, gender, and height is considered the midpoint of the normal range. A reading above the 95th percentile indicates hypertension.
Measured: At the beginning and at the end of 6 weeks of exercise.
KIDSCREEN Health-Related Quality of Life Questionnaire
KIDSCREEN52, which has been validated and reliable in Turkish, is a general purpose quality of life scale developed for children and adolescents aged 8-18, consisting of 52 questions in total. The KIDSCREEN-27 short form is a scale consisting of 27 questions and 5 dimensions, taken from KIDSCREEN-52. KIDSCREEN-27 consists of the dimensions of physical well-being (5 items), psychological well-being (7 items), autonomy and relationships with parents (7 items), social support and peers (4 items) and school environment (4 items).
Measured: At the beginning and at the end of 6 weeks of exercise.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted11 Dec 2024
- Study start9 Dec 2024
- Primary completion9 Jun 2025
- Study completion9 Sep 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Core StabilizationStudies 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
- Supportive care
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Outcomes assessor
- Enrolment
- 30 participants (actual)
Sponsor and investigators
- Lead sponsor
- Ozden Gokcek
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor-investigator, Ozden Gokcek, Ege University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06728267
- Sponsor's protocol ID
- 2024/12
- Status last verified
- Nov 2025
- First submitted
- 6 Dec 2024
- Last updated
- 21 Nov 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 21 Nov 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effects of Core Stabilization Training on Trunk Muscle Endurance, Respiratory Function and Quality of Life in Child and Adolescent Underwater Rugby Athletes
- ClinicalTrials.gov ID
- NCT06728267
- Acronym / sponsor ID
- 2024/12
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 30 participants (actual)
- Lead sponsor
- Ozden GokcekUniversity, hospital or other
- Study start
- 9 Dec 2024 (actual)
- Primary completion
- 9 Jun 2025 (actual)
- Study completion
- 9 Sep 2025 (actual)
- First posted
- 11 Dec 2024 (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.
Demographic information of children aged 9-17 who volunteer to participate in the study and who play underwater rugby will be recorded, and all participants; respiratory function will be assessed with a portable spirometer (Cosmed Poni FX) device, respiratory muscle strength will be assessed with a portable (micro RPM brand) electronic mouth pressure measurement device, and quality of life will be assessed with the KIDSCREEN scale. Core muscle endurance will be assessed with trunk flexion, trunk extension, lateral plank tests and flat plank test developed by McGill.
Respiratory muscle strength will be measured according to ATS/ERS criteria using a portable electronic mouth pressure measurement device (micro RPM brand). Respiratory function test will be performed using a portable spirometer (Cosmed Pony FX) to assess respiratory function. Capillary blood oxygen saturation of children will be recorded according to pulse oximetry results. Blood pressure will be measured with a cuff of appropriate size after a 5-minute rest according to age, gender and height percentile.
The experimental group will receive core stabilization training in addition to the training process. This training; Exercise training will be provided for 6 weeks, 3 days a week, 2 sets of 10 repetitions for the first two weeks, 2 sets of 15 repetitions for the second two weeks, and 3 sets of 12 repetitions for the third two weeks (Rahmat, et al., 2014). MIP/MEP values will be evaluated once a week. The control group will be monitored during the training and no training program will be given. The exercise program will be applied at the end of the project by being included in the follow-up list. The children will be taken to the second evaluation 6 weeks after the first evaluation.
Study design
- Primary purpose
- Supportive care
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Experimental Group | Experimental | Other: Core stabilization training, Other: TrainingThe experimental group will receive core stabilization training in addition to the training process. This training will be given for 6 weeks, 3 days a week, with 2 sets of 10 repetitions for the first two weeks, 2 sets of 15 repetitions for the second two weeks, and 3 sets of 12 repetitions for the third two weeks. |
| Control Group | Active comparator | Other: TrainingThe control group will be monitored throughout the training period and will not be given any training program. |
Who may qualify
- Ages
- 9 to 18 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult
Key inclusion criteria (3 listed)
- Doing underwater rugby.
- No mental problems.
- Able to cooperate.
Key exclusion criteria (3 listed)
- Diagnosed with respiratory system disease.
- Kyphoscoliosis and/or advanced postural alignment problems that will affect respiratory function.
- Any orthopedic and neurological problems.
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 |
|---|---|---|
| Core stabilization trainingExercise training will be given for 6 weeks, 3 days a week, 2 sets of 10 repetitions for the first two weeks, 2 sets of 15 repetitions for the second two weeks, and 3 sets of 12 repetitions for the third two weeks. | Other | Experimental Group |
| TrainingRoutine training sessions conducted by coaches specific to the sport of underwater rugby. | Other | Control Group, Experimental Group |
Primary outcome
Trunk Extension Test
Time frame: At the beginning and at the end of 6 weeks of exercise.
The time it takes to remain in a face down position on a stretcher, with ankles and knees fixed on the stretcher, the body outside the edge of the stretcher and 25 cm above the ground, with hands crossed in front, holding the shoulders without changing position, will be recorded in seconds.
Trunk Flexion Test
Time frame: At the beginning and at the end of 6 weeks of exercise.
The time spent in sit-up position on the floor mat, with the trunk upright at a 60-degree angle, knees and hips in a 90-degree flexion position, feet supported by the assistant and fixed on the ground, hands crossed on the chest, without changing position will be recorded in seconds.
Lateral Plank Test
Time frame: At the beginning and at the end of 6 weeks of exercise.
The time spent in the lateral plank position, with one foot supported on the other, straight along the body length, hips up, one elbow supporting the ground, the other holding the crossed shoulder in front, without changing position will be recorded in seconds.
Straight Plank Test
Time frame: At the beginning and at the end of 6 weeks of exercise.
The time it takes to remain in the push-up position, with the fingertips on the ground, the elbows bent and touching the ground, and the hips up without changing position will be recorded in seconds.
Muscle Strength
Time frame: At the beginning and at the end of 6 weeks of exercise.
According to the muscle test method found by Dr. Lovett, the muscle strength test is performed by scoring 0-5. Abdominal muscles, oblique trunk flexors and back extensors will be tested for muscle strength. Two separate tests will be performed for the lower and upper parts of the abdominal muscles.
Evaluation of the Stabilizing Function of the Transversus Abdominis Muscle
Time frame: At the beginning and at the end of 6 weeks of exercise.
Abdominal muscle activity was measured using the pressure biofeedback unit (PBU) during abdominal inhalation maneuver in the prone position and during posterior pelvic tilt movement in the supine position. Transversus abdominis muscle activity is assessed using the PBU with abdominal inhalation maneuver in the prone position. The cuff of the BBU is placed between the midpoint of the line connecting both spina iliaca anterior superiors of the participant and the umbilical cord. The participant is asked to breathe comfortably abdominally. The valve of the manometer is closed and the cuff is inflated to a pressure of 70 mmHg. All participants are given the standard command of "pull your abdomen in without moving your spine and hips and wait 10 seconds". The amount of pressure decrease in the manometer is recorded. The measurement will be repeated 3 times with 2-minute rest periods to prevent possible muscle fatigue and the average will be taken.
Respiratory Muscle Strength
Time frame: At the beginning and at the end of 6 weeks of exercise.
Respiratory muscle strength will be measured using a portable electronic mouth pressure measuring device (micro RPM brand) according to ATS/ERS criteria. Maximal inspiratory pressure (MIP) will be measured at residual volume and during deep inspiration. Maximal expiratory pressure (MEP) will be measured at total lung capacity and during deep expiration. Tests will be performed in the sitting position using a nose clip. Inspiratory and expiratory muscle strength values will be expressed as a percentage of the expected value.
Respiratory Function Test
Time frame: At the beginning and at the end of 6 weeks of exercise.
Respiratory function test will be performed using a portable spirometer (Cosmed Pony FX). The test will be performed in a sitting position, with the patient first asked to take a deep breath and then exhale quickly through the spirometer. A nose clip will be used during exhalation. Forced vital capacity (FVC), forced expiratory volume in one second (FEV1), FEV1/FVC will be recorded. Respiratory function test parameters will be expressed as a percentage of expected values according to age, height, body weight and sex.
Saturation
Time frame: At the beginning and at the end of 6 weeks of exercise.
Capillary blood oxygen saturation will be determined by pulse oximetry.
Blood Pressure
Time frame: At the beginning and at the end of 6 weeks of exercise.
ssessment of blood pressure is important to detect hypertension or hypovolemic shock. A blood pressure value in the 50th percentile for a child's age, gender, and height is considered the midpoint of the normal range. A reading above the 95th percentile indicates hypertension.
KIDSCREEN Health-Related Quality of Life Questionnaire
Time frame: At the beginning and at the end of 6 weeks of exercise.
KIDSCREEN52, which has been validated and reliable in Turkish, is a general purpose quality of life scale developed for children and adolescents aged 8-18, consisting of 52 questions in total. The KIDSCREEN-27 short form is a scale consisting of 27 questions and 5 dimensions, taken from KIDSCREEN-52. KIDSCREEN-27 consists of the dimensions of physical well-being (5 items), psychological well-being (7 items), autonomy and relationships with parents (7 items), social support and peers (4 items) and school environment (4 items).
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 21 Nov 2025.
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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 Core stabilization training and Training in people with Core Stabilization and Trunk Muscle Endurance, run by Ozden Gokcek 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 3 inclusion and 3 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 21 Nov 2025. 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?
Trunk Extension Test (time frame: At the beginning and at the end of 6 weeks of exercise.). The study lists 11 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 21 Nov 2025.