NCT07691229

Brief Summary

Virtual reality (VR) technology has emerged as a promising supplementary training tool in football, yet no study has simultaneously examined its effects on technical skills, training load, and mental fatigue within a randomized controlled design. This study evaluated the effects of an 8-week Rezzil Index® VR training program on football-specific technical skills, training load (sRPE), and mental fatigue in licensed male football players. Twenty-four male football players (age: 18.82±0.85 years) were randomly assigned to a VR training group (n=12) or a control group (n=12). The VR group completed two supplementary sessions per week using the Rezzil Index® application (HTC Vive Pro and Oculus Quest 2) in addition to regular team training. Football-specific technical skills, mental fatigue (Modified Color-Word Stroop Test), and training load (session RPE) were assessed pre- and post-intervention. The VR group demonstrated statistically significant improvements in all technical skill measures (p\<0.05; d=0.91-1.69, large effects). Rezzil Index® VR training is an effective complementary method for improving football-specific technical skills.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
24

participants targeted

Target at below P25 for not_applicable

Timeline
Completed

Started Dec 2022

Shorter than P25 for not_applicable

Geographic Reach
1 country

1 active site

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

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Study Timeline

Key milestones and dates

Study Start

First participant enrolled

December 1, 2022

Completed
3 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

March 1, 2023

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

March 1, 2023

Completed
3.3 years until next milestone

First Submitted

Initial submission to the registry

June 29, 2026

Completed
9 days until next milestone

First Posted

Study publicly available on registry

July 8, 2026

Completed
Last Updated

July 8, 2026

Status Verified

July 1, 2026

Enrollment Period

3 months

First QC Date

June 29, 2026

Last Update Submit

July 2, 2026

Conditions

Keywords

virtual realityfootballtechnical skillstraining loadmental fatigue

Outcome Measures

Primary Outcomes (1)

  • Football-Specific Technical Skills (Heading, Moving Ball Striking, Fixed Ball Striking, Loughborough Soccer Passing Test)

    Baseline and Week 8

Secondary Outcomes (2)

  • Training Load (Session Rating of Perceived Exertion - sRPE)

    Weekly, 8 weeks

  • Mental Fatigue (Modified Color-Word Stroop Test)

    Baseline and Week 8

Study Arms (2)

VR Training Group

EXPERIMENTAL

Participants completed Rezzil Index VR training twice weekly for 8 weeks in addition to regular team training.

Device: Rezzil Index VR

Control Group

ACTIVE COMPARATOR

Participants continued regular team training only.

Behavioral: Regular Team Training

Interventions

Immersive VR football training application (HTC Vive Pro and Oculus Quest 2), 2 sessions/week, 8 weeks

VR Training Group

Participants continued their standard club football training sessions as normal, with no additional VR-based or experimental intervention applied.

Control Group

Eligibility Criteria

Age18 Years+
Sexmale
Healthy VolunteersYes
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • Licensed male football players aged 18 years or older
  • Active participation in regular team training
  • No history of serious musculoskeletal injury in the past 6 months

You may not qualify if:

  • History of serious injury or surgical intervention
  • Psychiatric or neurological conditions
  • Regular use of medication affecting cognitive performance
  • Prior experience with VR training systems

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Manisa Celal Bayar University, Faculty of Sport Sciences

Manisa, Turkey (Türkiye)

Location

MeSH Terms

Conditions

Mental Fatigue

Condition Hierarchy (Ancestors)

FatigueSigns and SymptomsPathological Conditions, Signs and SymptomsBehavioral SymptomsBehavior

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
Doctor

Study Record Dates

First Submitted

June 29, 2026

First Posted

July 8, 2026

Study Start

December 1, 2022

Primary Completion

March 1, 2023

Study Completion

March 1, 2023

Last Updated

July 8, 2026

Record last verified: 2026-07

Data Sharing

IPD Sharing
Will not share

Locations