Athletic PerformanceTRXNCT07803640
Effects of 8-Week TRX Suspension Training on Body Composition, Anaerobic Power, and Biomotor Abilities in Young Male Volleyball Players
A study testing TRX Suspension Training Program and Standard Volleyball Training in people with Athletic Performance and Physical Fitness, run by Bitlis Eren University at 1 site in Turkey (Türkiye).
Trial summary
The purpose of this study was to examine the effects of an 8-week TRX suspension training program on body composition, anaerobic power, and selected biomotor abilities in young male volleyball players. Read more about this study
- Who is it for?
- Ages 14 to 18 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Athletic Performance, Physical Fitness
- What is being tested?
- TRX Suspension Training Program and Standard Volleyball Training
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 26 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 10 Dec 2024to 17 Jun 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 14 to 18 years
- Men only
- Healthy volunteers accepted
- Child, Adult
Who may be able to join
- Being a male volleyball player aged between 14 and 18 years
- Active membership in the Mus Sports High School volleyball team
- Voluntary participation in the study with signed informed consent from both the participant and their parent/guardian
- Continuous participation in regular volleyball team practices
- No history of severe musculoskeletal injuries or surgeries in the lower or upper extremities in the past 6 months
Who cannot join
- Absence from more than 10% of the planned TRX or volleyball training sessions during the 8-week intervention period
- Occurrence of any acute injury or medical condition preventing participation in training or performance tests
- Simultaneous participation in any other structured resistance, plyometric, or high-intensity conditioning program outside of the study protocol
- Failure to perform pre- or post-intervention performance tests
Trial locations and contacts
1 site in 1 country.
Turkey (Türkiye)1 site
Mus Sports High School Indoor Sports Hall
Muş, Central, 49100
About this study
Official title: The Effects of an Eight-Week TRX Suspension Training Intervention on Body Composition, Anaerobic Power, and Selected Biomotor Abilities in Young Male Volleyball Players: A Randomized Controlled Trial
The purpose of this study was to examine the effects of an 8-week TRX suspension training program on body composition, anaerobic power, and selected biomotor abilities in young male volleyball players.
A total of 26 male volleyball players (aged 14-18 years) were randomly assigned into two groups: an Experimental Group (n = 13) and a Control Group (n = 13). The control group participated solely in their routine volleyball training sessions, while the experimental group performed TRX suspension training twice a week in addition to their routine volleyball training over the 8-week period.
Pre- and post-intervention evaluations included body composition metrics, anaerobic power (Wingate anaerobic test), vertical jump height, handgrip strength, leg strength, and a 10-meter sprint test. The findings aim to provide evidence on the efficacy of suspension training for physical performance adaptation in youth volleyball athletes.
Read the detailed description
Suspension training using TRX equipment leverages body weight and gravity to develop strength, balance, flexibility, and core stability simultaneously. In volleyball, explosive power, sprint acceleration, and lower-body strength are essential physical performance components. This study was designed as a randomized controlled field trial with a pre-test and post-test design to evaluate the effects of chronic TRX training in young athletes.
The study was conducted at Mus Spor High School indoor sports facility following ethical approval and parental/participant informed consent procedures compliant with the Declaration of Helsinki.
Both groups underwent initial baseline testing before the 8-week period and final post-testing immediately after the completion of the protocol.
Baseline and post-intervention assessments included:
Body Composition: Evaluated using bioelectrical impedance analysis (Tanita BC-418 MA) following standard pre-test dietary and activity controls (measuring body weight, BMI, body fat percentage, fat-free mass, and total body water).
10-Meter Sprint Performance: Assessed using wireless photocell timing gates with a standing start 50 cm behind the line (best of two trials recorded).
Vertical Jump: Measured via Bosco Ergojump mat with hands placed on hips to eliminate arm swing assistance (best of two attempts recorded).
Leg Strength: Evaluated using a standard leg dynamometer with knees bent and back straight (best of two trials recorded in kg).
Handgrip Strength: Evaluated using a handgrip dynamometer with the arm straight at a 45-degree angle from the body (best trial recorded in kg).
Anaerobic Power: Evaluated via the 30-second Wingate Anaerobic Test on a Monark 834 E bicycle ergometer with a braking load equivalent to 7.5% of the participant's body weight. Key parameters included Peak Power (W/kg), Mean Power (W/kg), Minimum Power (W/kg), and Fatigue Index (%).
Intervention Protocol:
The TRX group completed 16 structured training sessions over 8 weeks (2 sessions per week). Each 16-minute session consisted of 8 specific TRX exercise variations: TRX Squat, TRX Row, TRX Squat Jump, TRX Chest Press, TRX Lateral Jump Squat, TRX Biceps Curl, TRX Assisted Pistol Squat, and TRX Tricep Extension. Progression was maintained at 2 sets of 8 repetitions, with 24 seconds of work and 30 seconds of rest per exercise, and a 120-second rest interval between sets. The control group engaged only in standard volleyball coaching drills and match practice.
- Conditions
- Athletic Performance, Physical Fitness
- Being tested
- TRX Suspension Training Program, Standard Volleyball Training
- Keywords
- TRX Suspension Training, Volleyball Athletes, Anaerobic Power, Explosive Strength, Body Composition, Youth Sports
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
TRX Suspension Training ProgramOther
An 8-week suspension training protocol consisting of 16 sessions (2 days/week, 16 min/session). Each session included 8 exercises: TRX Squat, TRX Row, TRX Squat Jump, TRX Chest Press, TRX Lateral Jump Squat, TRX Biceps Curl, TRX Assisted Pistol Squat, and TRX Tricep Extension. Training volume was set to 2 sets of 8 repetitions, with 24 seconds of exercise execution, 30 seconds of rest between exercises, and 120 seconds of rest between sets.
Standard Volleyball TrainingOther
Standard technical and tactical volleyball coaching session program, including warm-up routines, passing/spiking drills, simulated match play, and tactical team preparation exercises performed twice a week for 8 weeks.
| Study group | Role | What they receive |
|---|---|---|
| Experimental Group (TRX + Volleyball) | Experimental | Participants performed a structured TRX suspension training program 2 days per week for 8 weeks in addition to their routine volleyball training. Receives: Other: TRX Suspension Training Program; Other: Standard Volleyball Training |
| Control Group (Routine Volleyball Training) | Active comparator | Participants engaged exclusively in their standard routine volleyball training sessions (including technical-tactical drills, small-sided games, and match practice) twice a week for 8 weeks, without receiving any suspension training interventions. Receives: Other: Standard Volleyball Training |
What is being measured
The primary outcome is the main question the study is designed to answer.
10-Meter Sprint Performance
Evaluated using a wireless photocell timing gate system to measure short-distance acceleration. Participants started 50 cm behind the starting line, and the best time of two attempts was recorded in seconds.
Measured: Baseline (Week 0) and Post-test (Week 8)
Vertical Jump Height
Assessed lower-body explosive power using a Bosco Ergojump mat. Participants performed maximum vertical jumps with hands placed on hips to eliminate arm swing assistance. The best height of two trials was recorded in centimeters.
Measured: Baseline (Week 0) and Post-test (Week 8)
Leg Strength
Evaluated lower-body isometric strength using a leg dynamometer. Participants pulled the bar vertically with maximum force while maintaining a bent knee and straight back posture. The best of two trials was recorded in kilograms.
Measured: Baseline (Week 0) and Post-test (Week 8)
Wingate Anaerobic Peak Power
Assessed maximal anaerobic power output using the 30-second Wingate Anaerobic Test on a Monark 834 E bicycle ergometer with a constant load of 7.5% of the participant's body weight. Measured in Watts per kilogram (W/kg).
Measured: Baseline (Week 0) and Post-test (Week 8)
Secondary outcomes (4)
Handgrip Strength
Evaluated upper-body isometric grip strength using a handgrip dynamometer with the dominant arm extended straight at a 45-degree angle from the body. The best value was recorded in kilograms.
Measured: Baseline (Week 0) and Post-test (Week 8)
Body Fat Percentage
Evaluated via bioelectrical impedance analysis using Tanita BC-418 MA to determine total body fat percentage (%).
Measured: Baseline (Week 0) and Post-test (Week 8)
Body Mass Index
Calculated as weight in kilograms divided by height in meters squared (kg/m²) using Tanita BC-418 MA.
Measured: Baseline (Week 0) and Post-test (Week 8)
Fat-Free Mass
Evaluated via bioelectrical impedance analysis using Tanita BC-418 MA to assess lean body mass in kilograms.
Measured: Baseline (Week 0) and Post-test (Week 8)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted3 Sep 2026
- Study start10 Dec 2024
- Primary completion7 Feb 2025
- Study completion17 Jun 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Athletic PerformanceStudies 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
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Model description
- Participants were randomly assigned into two parallel groups: an Experimental Group (TRX + Volleyball) and a Control Group (Volleyball Only).
- Masking
- None (open label)
- Enrolment
- 26 participants (actual)
Sponsor and investigators
- Lead sponsor
- Bitlis Eren University
- Sponsor type
- University, hospital or other
- Collaborators
- Muş Alparslan University
- Responsible party
- Principal investigator, Muhammed Zahit Kahraman, Bitlis Eren University
- Investigators
- Muhammed Z Kahraman, PhD, Principal investigator, Bitlis Eren University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07803640
- Sponsor's protocol ID
- BEU-ANT-MZK-02
- Acronym
- TRX
- Status last verified
- Sep 2026
- First submitted
- 29 Aug 2026
- Last updated
- 3 Sep 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No: IPD (Individual Participant Data) will not be made publicly available to protect participant privacy and maintain confidentiality, as explicit consent for raw individual data sharing was not obtained during the initial ethics committee approval process. However, aggregated statistical data and summary results are fully presented within the published thesis/manuscript and are available from the corresponding author upon reasonable academic request.
Study at a glance
From the registry record, last updated by the sponsor on 3 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Effects of an Eight-Week TRX Suspension Training Intervention on Body Composition, Anaerobic Power, and Selected Biomotor Abilities in Young Male Volleyball Players: A Randomized Controlled Trial
- ClinicalTrials.gov ID
- NCT07803640
- Acronym / sponsor ID
- TRX / BEU-ANT-MZK-02
- Conditions
- Athletic Performance, Physical Fitness
- Keywords
- TRX Suspension Training, Volleyball Athletes, Anaerobic Power, Explosive Strength, Body Composition, Youth Sports
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 26 participants (actual)
- Lead sponsor
- Bitlis Eren UniversityUniversity, hospital or other
- Collaborators
- Muş Alparslan University
- Study start
- 10 Dec 2024 (actual)
- Primary completion
- 7 Feb 2025 (actual)
- Study completion
- 17 Jun 2025 (actual)
- First posted
- 3 Sep 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.
The purpose of this study was to examine the effects of an 8-week TRX suspension training program on body composition, anaerobic power, and selected biomotor abilities in young male volleyball players.
A total of 26 male volleyball players (aged 14-18 years) were randomly assigned into two groups: an Experimental Group (n = 13) and a Control Group (n = 13). The control group participated solely in their routine volleyball training sessions, while the experimental group performed TRX suspension training twice a week in addition to their routine volleyball training over the 8-week period.
Pre- and post-intervention evaluations included body composition metrics, anaerobic power (Wingate anaerobic test), vertical jump height, handgrip strength, leg strength, and a 10-meter sprint test. The findings aim to provide evidence on the efficacy of suspension training for physical performance adaptation in youth volleyball athletes.
Detailed description
Suspension training using TRX equipment leverages body weight and gravity to develop strength, balance, flexibility, and core stability simultaneously. In volleyball, explosive power, sprint acceleration, and lower-body strength are essential physical performance components. This study was designed as a randomized controlled field trial with a pre-test and post-test design to evaluate the effects of chronic TRX training in young athletes.
The study was conducted at Mus Spor High School indoor sports facility following ethical approval and parental/participant informed consent procedures compliant with the Declaration of Helsinki.
Both groups underwent initial baseline testing before the 8-week period and final post-testing immediately after the completion of the protocol.
Baseline and post-intervention assessments included:
Body Composition: Evaluated using bioelectrical impedance analysis (Tanita BC-418 MA) following standard pre-test dietary and activity controls (measuring body weight, BMI, body fat percentage, fat-free mass, and total body water).
10-Meter Sprint Performance: Assessed using wireless photocell timing gates with a standing start 50 cm behind the line (best of two trials recorded).
Vertical Jump: Measured via Bosco Ergojump mat with hands placed on hips to eliminate arm swing assistance (best of two attempts recorded).
Leg Strength: Evaluated using a standard leg dynamometer with knees bent and back straight (best of two trials recorded in kg).
Handgrip Strength: Evaluated using a handgrip dynamometer with the arm straight at a 45-degree angle from the body (best trial recorded in kg).
Anaerobic Power: Evaluated via the 30-second Wingate Anaerobic Test on a Monark 834 E bicycle ergometer with a braking load equivalent to 7.5% of the participant's body weight. Key parameters included Peak Power (W/kg), Mean Power (W/kg), Minimum Power (W/kg), and Fatigue Index (%).
Intervention Protocol:
The TRX group completed 16 structured training sessions over 8 weeks (2 sessions per week). Each 16-minute session consisted of 8 specific TRX exercise variations: TRX Squat, TRX Row, TRX Squat Jump, TRX Chest Press, TRX Lateral Jump Squat, TRX Biceps Curl, TRX Assisted Pistol Squat, and TRX Tricep Extension. Progression was maintained at 2 sets of 8 repetitions, with 24 seconds of work and 30 seconds of rest per exercise, and a 120-second rest interval between sets. The control group engaged only in standard volleyball coaching drills and match practice.
Study design
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
- Model description
- Participants were randomly assigned into two parallel groups: an Experimental Group (TRX + Volleyball) and a Control Group (Volleyball Only).
| Arm | Type | Receives |
|---|---|---|
| Experimental Group (TRX + Volleyball) | Experimental | Other: TRX Suspension Training Program, Other: Standard Volleyball TrainingParticipants performed a structured TRX suspension training program 2 days per week for 8 weeks in addition to their routine volleyball training. |
| Control Group (Routine Volleyball Training) | Active comparator | Other: Standard Volleyball TrainingParticipants engaged exclusively in their standard routine volleyball training sessions (including technical-tactical drills, small-sided games, and match practice) twice a week for 8 weeks, without receiving any suspension training interventions. |
Who may qualify
- Ages
- 14 to 18 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult
Key inclusion criteria (5 listed)
- Being a male volleyball player aged between 14 and 18 years
- Active membership in the Mus Sports High School volleyball team
- Voluntary participation in the study with signed informed consent from both the participant and their parent/guardian
- Continuous participation in regular volleyball team practices
- No history of severe musculoskeletal injuries or surgeries in the lower or upper extremities in the past 6 months
Key exclusion criteria (4 listed)
- Absence from more than 10% of the planned TRX or volleyball training sessions during the 8-week intervention period
- Occurrence of any acute injury or medical condition preventing participation in training or performance tests
- Simultaneous participation in any other structured resistance, plyometric, or high-intensity conditioning program outside of the study protocol
- Failure to perform pre- or post-intervention performance tests
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 |
|---|---|---|
| TRX Suspension Training ProgramAn 8-week suspension training protocol consisting of 16 sessions (2 days/week, 16 min/session). Each session included 8 exercises: TRX Squat, TRX Row, TRX Squat Jump, TRX Chest Press, TRX Lateral Jump Squat, TRX Biceps Curl, TRX Assisted Pistol Squat, and TRX Tricep Extension. Training volume was set to 2 sets of 8 repetitions, with 24 seconds of exercise execution, 30 seconds of rest between exercises, and 120 seconds of rest between sets. | Other | Experimental Group (TRX + Volleyball) |
| Standard Volleyball TrainingStandard technical and tactical volleyball coaching session program, including warm-up routines, passing/spiking drills, simulated match play, and tactical team preparation exercises performed twice a week for 8 weeks. | Other | Control Group (Routine Volleyball Training), Experimental Group (TRX + Volleyball) |
Primary outcome
10-Meter Sprint Performance
Time frame: Baseline (Week 0) and Post-test (Week 8)
Evaluated using a wireless photocell timing gate system to measure short-distance acceleration. Participants started 50 cm behind the starting line, and the best time of two attempts was recorded in seconds.
Vertical Jump Height
Time frame: Baseline (Week 0) and Post-test (Week 8)
Assessed lower-body explosive power using a Bosco Ergojump mat. Participants performed maximum vertical jumps with hands placed on hips to eliminate arm swing assistance. The best height of two trials was recorded in centimeters.
Leg Strength
Time frame: Baseline (Week 0) and Post-test (Week 8)
Evaluated lower-body isometric strength using a leg dynamometer. Participants pulled the bar vertically with maximum force while maintaining a bent knee and straight back posture. The best of two trials was recorded in kilograms.
Wingate Anaerobic Peak Power
Time frame: Baseline (Week 0) and Post-test (Week 8)
Assessed maximal anaerobic power output using the 30-second Wingate Anaerobic Test on a Monark 834 E bicycle ergometer with a constant load of 7.5% of the participant's body weight. Measured in Watts per kilogram (W/kg).
4 secondary outcomes
Handgrip Strength
Time frame: Baseline (Week 0) and Post-test (Week 8)
Body Fat Percentage
Time frame: Baseline (Week 0) and Post-test (Week 8)
Body Mass Index
Time frame: Baseline (Week 0) and Post-test (Week 8)
Fat-Free Mass
Time frame: Baseline (Week 0) and Post-test (Week 8)
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 3 Sep 2026.
- Individual participant dataSharing planned: No. IPD (Individual Participant Data) will not be made publicly available to protect participant privacy and maintain confidentiality, as explicit consent for raw individual data sharing was not obtained during the initial ethics committee approval process. However, aggregated statistical data and summary results are fully presented within the published thesis/manuscript and are available from the corresponding author upon reasonable academic request.
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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.
Muhammed Z Kahraman, PhD principal investigator
Bitlis Eren University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing TRX Suspension Training Program and Standard Volleyball Training in people with Athletic Performance and Physical Fitness, run by Bitlis Eren 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 5 inclusion and 4 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 3 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?
10-Meter Sprint Performance (time frame: Baseline (Week 0) and Post-test (Week 8)). The study lists 4 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 3 Sep 2026.