Injury Risks Among Acrobatic Gymnastics in Relation to Balance Training (ACRO-GYM)

November 6, 2026 updated by: Istanbul Galata University

Evaluation of the Injury Risks Among Acrobatic Gymnastics in Relation to Dynamic and Static Balance Training

The goal of this observational study is to understand how injury risk is related to dynamic and static balance, foot posture, training characteristics, and sleep quality in competitive acrobatic gymnasts of different ages, sexes, categories, and positions (base, middle, top). The main questions it aims to answer are:

Do acute and overuse injury occurrence and severity differ by age, sex, acrobatic category, and position in the pyramid?

Are injury risks associated with balance performance, foot posture index, overuse injury questionnaire scores, and sleep quality scores?

Participants will:

Complete online questionnaires including a sports injury/overuse questionnaire (OSTRC-O) and the Pittsburgh Sleep Quality Index (PSQI).

Provide information on age, sex, training history, acrobatic category and position, and previous injuries.

Undergo balance and foot posture assessments according to the study protocol.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
300

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • Bulgaria
      • Sofia, Bulgaria
        • Recruiting
        • The Bulgarian Federation of Sports Acrobatics and Gymnastics

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

11 years to 30 years (Child, Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Sampling Method

Probability Sample

Study Population

Competitive acrobatic gymnasts training in clubs in Bulgaria, Italy, and other European countries will be included. Participants of both sexes across youth and adult age groups, actively training and competing in acrobatic gymnastics in base, middle, or top positions, will be recruited.

Description

Inclusion Criteria:

  • Competitive acrobatic gymnasts training at a club recognized by national or international federations in Bulgaria, Italy, and other European countries.
  • Age range 11 - 30 years old
  • Currently training regularly for at least 2 years.

Exclusion Criteria:

  • Gymnasts unable to complete questionnaires or balance tests.
  • Acute medical conditions preventing participation.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: COHORT
  • Time Perspectives: CROSS_SECTIONAL

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Oslo Sports Trauma Research Center Overuse Injury Questionnaire (OSTRC-O)
Time Frame: Baseline

Injury presence and severity over the last 12 months assessed by the Oslo Sports Trauma Research Center Overuse Injury Questionnaire (OSTRC-O); total score categorized as injury vs. no-injury (score >0 vs. 0). Used to evaluate Injury occurrence and severity in acrobatic gymnasts.
Baseline
Sociodemographic Assessment
Time Frame: Baseline

The athletes' age, sex, weight, height, sports history, daily and weekly training hours, number of years participating in this sport, history of physical/recreational activities, and social participation habits will be investigated using a specially designed questionnaire.
Baseline
Body Mass Index (BMI)
Time Frame: Baseline

Body mass index (BMI) will be calculated by dividing weight in kilograms by the square of height in meters (kg/m²).
Baseline
6-item Foot Posture Index (FPI)
Time Frame: Baseline

Foot posture will be assessed using the 6-item Foot Posture Index (FPI), which scores each foot from -2 to +2 per item and yields a total score indicating supinated (negative values), neutral (0 to +5), or pronated (>+5) foot posture based on standardized photographs taken in relaxed standing.
Baseline
Pittsburgh Sleep Quality Index (PSQI)
Time Frame: Baseline

Sleep quality will be assessed using the Pittsburgh Sleep Quality Index (PSQI), a 19-item self-report questionnaire that yields a total score from 0 to 21, where higher scores indicate worse sleep quality and scores above 5 reflect poor clinical sleep quality.
Baseline

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Istanbul Galata University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
May 29, 2025

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 1, 2027

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 1, 2027

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
November 6, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 6, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
November 12, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
November 12, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 6, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
February 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • ACRO-GYM-2026

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Cookie Settings

We use cookies to ensure that we give you the best experience on our website. For more details carefully read our Privacy and Cookies Policy. ...>>>You can change your preferences or withdraw your consent at any time by deleting the cookies from your website or computer as described in the policy. Please accept it and choose your preferences by ticking the corresponding boxes in the "Manage Settings" section below. Please carefully read our Terms of Service before you proceed with using any part of this website.
«Manage Settings