Effects of 8-Week TRX Suspension Training on Body Composition, Anaerobic Power, and Biomotor Abilities in Young Male Volleyball Players

NCT07803640 | Completed

• 1 other identifier: BEU-ANT-MZK-02
• Study Type: interventional
• Target: 26
• Locations: 1 country
• Sites: 1

Brief 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. 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.

Conditions

Athletic Performance; Physical Fitness

Keywords

TRX Suspension Training; Volleyball Athletes; Anaerobic Power; Explosive Strength; Body Composition; Youth Sports

Outcome Measures

Primary Outcomes (4)

• 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.

  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.

  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.

  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).

  Baseline (Week 0) and Post-test (Week 8)

Secondary Outcomes (4)

• Handgrip Strength

  Baseline (Week 0) and Post-test (Week 8)

• Body Fat Percentage

  Baseline (Week 0) and Post-test (Week 8)

• Body Mass Index

  Baseline (Week 0) and Post-test (Week 8)

• Fat-Free Mass

  Baseline (Week 0) and Post-test (Week 8)

Study Arms (2)

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.

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.

Other: Standard Volleyball Training

Interventions

TRX Suspension Training Program OTHER

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.

Experimental Group (TRX + Volleyball)

Standard Volleyball Training OTHER

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.

Control Group (Routine Volleyball Training); Experimental Group (TRX + Volleyball)

Eligibility Criteria

• Age: 14 Years - 18 Years
• Sex: male
• Healthy Volunteers: Yes
• Age Groups: Child (0-17), Adult (18-64)

You may qualify if:

• 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

You may not qualify if:

• 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

Sponsors & Collaborators

• Bitlis Eren University: lead
• Muş Alparslan University: collaborator

Study Sites (1)

Mus Sports High School Indoor Sports Hall

Muş, Central, 49100, Turkey (Türkiye)

Location

Study Officials

• Muhammed Z Kahraman, PhD

  Bitlis Eren University

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: OTHER
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Associate Professor

Model Details: Participants were randomly assigned into two parallel groups: an Experimental Group (TRX + Volleyball) and a Control Group (Volleyball Only).

Study Record Dates

• First Submitted: August 29, 2026
• First Posted: September 3, 2026
• Study Start: December 10, 2024
• Primary Completion: February 7, 2025
• Study Completion: June 17, 2025
• Last Updated: September 3, 2026

Record last verified: 2026-09

Data Sharing

• IPD Sharing: Will not share

Locations

TU (1)