TRX ExerciseNCT07464509
TRX Exercises and Gastrointestinal Health in Swimmers
A study testing Exercise in people with TRX Exercise and Bowel Habits, run by Aksaray University at 1 site in Turkey (Türkiye).
Trial summary
Purpose Exercise-related gastrointestinal complaints are frequently reported in young athletes; however, evidence regarding the effects of resistance-based training modalities on bowel habits is limited. Read more about this study
- Who is it for?
- Ages 9 to 13 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- TRX Exercise, Bowel Habits, Gastrointestinal Symptoms
- What is being tested?
- Exercise
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 32 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 28 May 2025to 30 Aug 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 13 years
- Men only
- Healthy volunteers accepted
- Child
Who may be able to join
- Who have been performance athletes for at least 2 years
- Male swimmers aged 9-13 years who trained in swimming at least 3 days per week,
- Had not participated in any resistance training other than regular swimming training in the last six months,
- Did not have chronic diseases such as asthma or chronic heart disease were included in the study.
Who cannot join
- Athletes with chronic diseases such as asthma or chronic heart disease, non-performance swimmers,
- Those who had participated in any resistance training other than regular swimming training within the last six months,
- Athletes whose parental consent forms were not obtained, those who missed more than three training sessions, and those who provided misleading answers or did not properly complete the questionnaire were excluded from the study.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Effects of 8-Week TRX Exercise Program on Bowel Habits and Gastrointestinal Symptoms in Competitive Male Swimmers Aged 9-13: A Randomized Controlled Trial
Purpose Exercise-related gastrointestinal complaints are frequently reported in young athletes; however, evidence regarding the effects of resistance-based training modalities on bowel habits is limited. The aim of this study was to investigate the effect of an 8-week TRX program on bowel habits and gastrointestinal system of male child swimmers.
Methods Thirty-two prepubertal male swimmers aged 9-13 years were voluntarily enrolled in the study. Participants were randomly allocated to either the TRX or control group. Both groups were evaluated using the Bristol Stool Scale and a questionnaire assessing defecation habits before and after the 8-week TRX exercise program.
Read the detailed description
This study was conducted as an 8-week randomized controlled trial with 32 male swimmers. Participants were randomly divided into two groups (TRX, n=16 and Control, n=16) by Random Allocation Software. The TRX group and the control group were administered the Bristol Stool Scale and a questionnaire including defecation habits before and after the 8-week program. The shape of the feces differs according to the duration of their stay in the colon. For this reason, BSFS has been recognized as a reliable and rapid indicator of transit time. According to this scale, individuals' stools are classified into 7 groups, with Form 1 and Form 2 representing slow passage of stool through the colon, Form 3 and Form 4 representing normal passage of stool through the colon, and Form 5 and Form 6 representing rapid passage of stool through the colon and impaired rectal sensitivity.
Before starting the exercise program, the TRX group was subjected to a training session. The exercise protocol, questionnaire and scales were administered in a gym at a temperature of 20-24°C. No ergogenic supplements were given to the athletes during the study and they were asked to follow their normal diet. Since our study aimed to compare the effect of TRX exercise model with constipation and bowel habits, no additional food (apricots, plums, etc.) and medication (laxatives, etc.) were given to the children.
During the study period, all training sessions were performed between 12.00-13.30 (±1 hour), Monday-Wednesday-Friday. The athletes participated in a total of 24 exercise sessions 3 days a week for 8 weeks. Exercise intensity was determined according to TRX stability, vectorial and pendulum principles.
A total of 10 exercises were applied to the participants. These exercises consisted of movements for the upper body, lower body and core. Core exercises include Bicycle Crunch and Knee Tuck; lower extremity exercises include Calf Rise, Hamstring Curl, Lateral Skater With Stick and TRX Squat Jump; and finally upper extremity exercises include Chest Fly, Chest Press, Biceps Curl and TRX Inverted Row. Swimmers were given 45 seconds rest time between sets and 2 minutes rest time between each exercise. The Bristol stool scale and questionnaires including defecation habits were administered before starting the exercise program and after the 8th week of the training program was completed. No side effects or injuries were observed during the training.
- Conditions
- TRX Exercise, Bowel Habits, Gastrointestinal Symptoms, Swimming
- Being tested
- Exercise, Randomized Controlled Trial
- Keywords
- Swimming, TRX exercise, bowel habits, gastrointestinal symptoms
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
ExerciseBehavioural
Also called Trx and Swimming
In this model, a specific intervention is applied to the experimental group (TRX and swimming). Measurements are conducted before and after the intervention (pre-test / post-test). In the study, the TRX group performed TRX exercises in addition to their regular swimming training for 8 weeks, three days per week, for 45-60 minutes per session.
Randomized Controlled TrialOther
Also called Swimming
The control group participated only in their regular swimming training program for 8 weeks. No additional intervention, such as another exercise program, was applied to the control group during the stady.
| Study group | Role | What they receive |
|---|---|---|
| TRX GRUP | Experimental | The TRX group participated in both the 8-week TRX exercise program and their regular swimming training program. The Bristol Stool Scale and a questionnaire assessing defecation habits were administered before and after the intervention. Receives: Behavioral: Exercise |
| Control group | Experimental | The control group participated only in their regular swimming training program for 8 weeks. No additional intervention, such as another exercise program, was applied to the control group during the study. Receives: Other: Randomized Controlled Trial |
What is being measured
The primary outcome is the main question the study is designed to answer.
Height and Body Weight/Body Mass Index (BMI)
Body Weight;Measured in kilograms (kg). Height; Measured in meters (m). Body Mass Index (BMI) Calculated as body weight in kilograms divided by height in meters squared (kg/m²).
Body Composition was calculated using the formula kg/m2.
Measured: Time Frame: 8 Week
Secondary outcomes (1)
Bristol Stool Form Scale
Was developed by Lewis and Heaton at the University of Bristol to assess the colonic rates of individuals. The shape of the feces differs according to the duration of their stay in the colon. For this reason, Bristol Stool Form Scale has been recognized as a reliable and rapid indicator of transit time.
According to this scale, individuals' stools are classified into 7 groups, with Form 1 and Form 2 representing slow passage of stool through the colon, Form 3 and Form 4 representing normal passage of stool through the colon, and Form 5 and Form 6 representing rapid passage of stool through the colon and impaired rectal sensitivity.
Measured: 8 week
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted11 Mar 2026
- Study start28 May 2025
- Primary completion30 Aug 2025
- Study completion30 Aug 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for TRX ExerciseStudies 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
- Screening
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Single blind
- Who is masked
- Participant
- Enrolment
- 32 participants (actual)
Sponsor and investigators
- Lead sponsor
- Aksaray University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Yağmur YILDIZ, Aksaray University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07464509
- Sponsor's protocol ID
- 2025/72
- Status last verified
- Mar 2026
- First submitted
- 11 Feb 2026
- Last updated
- 11 Mar 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Yildiz Y, Kahve AN. Effects of 8-week TRX exercise program on bowel habits and gastrointestinal symptoms in competitive male swimmers aged 9-13: a randomized controlled trial. BMC Sports Sci Med Rehabil. 2026 Jun 15. doi: 10.1186/s13102-026-01806-6. Online ahead of print.
PubMed 42298701
Study at a glance
From the registry record, last updated by the sponsor on 11 Mar 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effects of 8-Week TRX Exercise Program on Bowel Habits and Gastrointestinal Symptoms in Competitive Male Swimmers Aged 9-13: A Randomized Controlled Trial
- ClinicalTrials.gov ID
- NCT07464509
- Acronym / sponsor ID
- 2025/72
- Conditions
- TRX Exercise, Bowel Habits, Gastrointestinal Symptoms, Swimming
- Keywords
- Swimming, TRX exercise, bowel habits, gastrointestinal symptoms
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 32 participants (actual)
- Lead sponsor
- Aksaray UniversityUniversity, hospital or other
- Study start
- 28 May 2025 (actual)
- Primary completion
- 30 Aug 2025 (actual)
- Study completion
- 30 Aug 2025 (actual)
- First posted
- 11 Mar 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.
Purpose Exercise-related gastrointestinal complaints are frequently reported in young athletes; however, evidence regarding the effects of resistance-based training modalities on bowel habits is limited. The aim of this study was to investigate the effect of an 8-week TRX program on bowel habits and gastrointestinal system of male child swimmers.
Methods Thirty-two prepubertal male swimmers aged 9-13 years were voluntarily enrolled in the study. Participants were randomly allocated to either the TRX or control group. Both groups were evaluated using the Bristol Stool Scale and a questionnaire assessing defecation habits before and after the 8-week TRX exercise program.
Detailed description
This study was conducted as an 8-week randomized controlled trial with 32 male swimmers. Participants were randomly divided into two groups (TRX, n=16 and Control, n=16) by Random Allocation Software. The TRX group and the control group were administered the Bristol Stool Scale and a questionnaire including defecation habits before and after the 8-week program. The shape of the feces differs according to the duration of their stay in the colon. For this reason, BSFS has been recognized as a reliable and rapid indicator of transit time. According to this scale, individuals' stools are classified into 7 groups, with Form 1 and Form 2 representing slow passage of stool through the colon, Form 3 and Form 4 representing normal passage of stool through the colon, and Form 5 and Form 6 representing rapid passage of stool through the colon and impaired rectal sensitivity.
Before starting the exercise program, the TRX group was subjected to a training session. The exercise protocol, questionnaire and scales were administered in a gym at a temperature of 20-24°C. No ergogenic supplements were given to the athletes during the study and they were asked to follow their normal diet. Since our study aimed to compare the effect of TRX exercise model with constipation and bowel habits, no additional food (apricots, plums, etc.) and medication (laxatives, etc.) were given to the children.
During the study period, all training sessions were performed between 12.00-13.30 (±1 hour), Monday-Wednesday-Friday. The athletes participated in a total of 24 exercise sessions 3 days a week for 8 weeks. Exercise intensity was determined according to TRX stability, vectorial and pendulum principles.
A total of 10 exercises were applied to the participants. These exercises consisted of movements for the upper body, lower body and core. Core exercises include Bicycle Crunch and Knee Tuck; lower extremity exercises include Calf Rise, Hamstring Curl, Lateral Skater With Stick and TRX Squat Jump; and finally upper extremity exercises include Chest Fly, Chest Press, Biceps Curl and TRX Inverted Row. Swimmers were given 45 seconds rest time between sets and 2 minutes rest time between each exercise. The Bristol stool scale and questionnaires including defecation habits were administered before starting the exercise program and after the 8th week of the training program was completed. No side effects or injuries were observed during the training.
Study design
- Primary purpose
- Screening
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Single blind (participant)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| TRX GRUP | Experimental | Behavioral: ExerciseThe TRX group participated in both the 8-week TRX exercise program and their regular swimming training program. The Bristol Stool Scale and a questionnaire assessing defecation habits were administered before and after the intervention. |
| Control group | Experimental | Other: Randomized Controlled TrialThe control group participated only in their regular swimming training program for 8 weeks. No additional intervention, such as another exercise program, was applied to the control group during the study. |
Who may qualify
- Ages
- 9 to 13 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Child
Key inclusion criteria (4 listed)
- Who have been performance athletes for at least 2 years
- Male swimmers aged 9-13 years who trained in swimming at least 3 days per week,
- Had not participated in any resistance training other than regular swimming training in the last six months,
- Did not have chronic diseases such as asthma or chronic heart disease were included in the study.
Key exclusion criteria (3 listed)
- Athletes with chronic diseases such as asthma or chronic heart disease, non-performance swimmers,
- Those who had participated in any resistance training other than regular swimming training within the last six months,
- Athletes whose parental consent forms were not obtained, those who missed more than three training sessions, and those who provided misleading answers or did not properly complete the questionnaire were excluded from the study.
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 |
|---|---|---|
| ExerciseAlso: Trx and SwimmingIn this model, a specific intervention is applied to the experimental group (TRX and swimming). Measurements are conducted before and after the intervention (pre-test / post-test). In the study, the TRX group performed TRX exercises in addition to their regular swimming training for 8 weeks, three days per week, for 45-60 minutes per session. | Behavioural | TRX GRUP |
| Randomized Controlled TrialAlso: SwimmingThe control group participated only in their regular swimming training program for 8 weeks. No additional intervention, such as another exercise program, was applied to the control group during the stady. | Other | Control group |
Primary outcome
Height and Body Weight/Body Mass Index (BMI)
Time frame: Time Frame: 8 Week
Body Weight;Measured in kilograms (kg). Height; Measured in meters (m). Body Mass Index (BMI) Calculated as body weight in kilograms divided by height in meters squared (kg/m²). Body Composition was calculated using the formula kg/m2.
1 secondary outcome
Bristol Stool Form Scale
Time frame: 8 week
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 11 Mar 2026.
- Derived from this study: PubMed 42298701Yildiz Y, Kahve AN. Effects of 8-week TRX exercise program on bowel habits and gastrointestinal symptoms in competitive male swimmers aged 9-13: a randomized controlled trial. BMC Sports Sci Med Rehabil. 2026 Jun 15. doi: 10.1186/s13102-026-01806-6. Online ahead of print.
- 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 Exercise in people with TRX Exercise and Bowel Habits, run by Aksaray University 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 4 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 11 Mar 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?
Height and Body Weight/Body Mass Index (BMI) (time frame: Time Frame: 8 Week). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT07464509, which also lists 1 linked publication.
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 11 Mar 2026.