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Scapular DyskinesisNCT06848114

The Effect of Posture and Scapular Position on Performance Parameters in E-sport Players

An observational study of Scapular Dyskinesis and Shoulder Proprioception, run by Ömer Bayrak at 1 site in Turkey (Türkiye).

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The research aims to examine how shoulder proprioception, scapular position, physical activity levels and posture influence key performance factors such as visual reaction time, audiotory reaction time and hand-eye coordination. Read more about this study

Who is it for?
Ages 18 to 25 years, men onlyHealthy volunteers can take part
How many people
27 participants
Where
1 siteTurkey (Türkiye)
Study dates
1 Sep 2023to 1 Nov 2024
How long will I take part?
1 Month
Phase
Observational
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 18 to 25 years
  • Men only
  • Healthy volunteers accepted
  • Adult

Study population: E-sport Players in FUT E-sport Teams

Who may be able to join

  • Individuals aged between 18 and 25 years. Professional engagement in PC or mobile e-sports for at least 6 hours per week continuously for the last six months.
  • PC professional e-sports players compete at a high level within a team, participating in competitive PC gaming.
  • Mobile professional e-sports players compete at a high level within a team, participating in competitive mobile gaming.
  • Control group: Individuals aged 18-25 years who played video games for less than 6 hours per week.

Who cannot join

  • Any neurological, visual, or auditory impairment. History of upper extremity surgery. Use of medications known for their stimulant properties. Conditions that could interfere with test performance.

Trial locations and contacts

1 site in 1 country.

Turkey (Türkiye)1 site
  • Haliç University

    Istanbul, Eyüpsultan, 34030

Other trials in Turkey (Türkiye)

About this study

The research aims to examine how shoulder proprioception, scapular position, physical activity levels and posture influence key performance factors such as visual reaction time, audiotory reaction time and hand-eye coordination.

Various digital tools and tests will be utilized for assessment, including reaction time tests and hand-eye coordination evaluations conducted through HumanBenchmark and Audioreactiontime websites respectively, as well as posture analysis via mobile applications. Shoulder proprioception will be measured at specific flexion angles using a smartphone-based inclinometer, while scapular dyskinesis will be assessed through the lateral scapular sliding test. Additionally, participants' physical activity levels, assessed via the International Physical Activity Questionnaire (IPAQ), will be analyzed to determine potential correlations.

Read the detailed description

E-sport is a competitive sport based on video games played professionally and multiplayer. To perform successfully in e-sport, high coordination and good reaction speed are essential. Studies indicate that prolonged inactivity and lack of physical activity in front of the computer can lead to weakening of motor skills and postural disorders. Additionally, abnormal positioning and movement of the scapula may reflect changes in the activity of surrounding muscles, potentially disrupting the coordinated movement with the humerus and possibly affect shoulder proprioception.

Based on this information, the investigators hypothesize that scapular dyskinesis and postural disorders in e-sport players affect their performance. The aim of our study is to investigate the impact of scapular position and posture on performance parameters, including hand-eye coordination, reaction time, shoulder proprioception, and physical activity among e-sport players.

For the assessment of visual reaction time, will be measured using the test on available on "humanbenchmark.com" will be used. Auditory reaction time will be measured using the test available on "playback.fm." Hand-eye coordination will be evaluated through the "Aim Reaction" test. Posture assessment will be conducted using the mobile application "PostureScreen."

Shoulder joint position sense will be assessed with the smartphone application "Clinometer" at 55°, 90°, and 125° shoulder flexion angles. Scapular dyskinesis will be evaluated using the lateral scapular sliding test at three different shoulder angles with a caliper.

The physical activity levels of the e-sport players will be determined using the International Physical Activity Questionnaire (IPAQ).

Keywords
Reaction time, Hand-eye coordination, Scapular dyskinesis, Posture, E-sport, Shoulder proprioception
Medical subject headings
Motor Activity

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

Study groups in NCT06848114
Study groupRoleWhat they receive
Mobile E-sport PlayersMobile professional e-sports players compete at a high level within a team, participating in competitive mobile gaming.
PC E-sport PlayersPC professional e-sports players compete at a high level within a team, participating in competitive PC gaming.
Control groupIndividuals aged 18-25 years who played video games for less than 6 hours per week.

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. The International Physical Activity Questionnaire (IPAQ)

    The International Physical Activity Questionnaire (IPAQ) short form will assess e-sport players' physical activity levels. This validated questionnaire consists of seven items measuring time spent on walking, moderate, and vigorous activities, with energy expenditure expressed as MET minutes per week. The total score is calculated by summing the duration (minutes) and frequency (days) of each activity, while sedentary time is recorded separately. Only activities lasting at least 10 consecutive minutes are included.

    Scores are calculated as "MET minutes/week" by multiplying duration, frequency, and MET values: walking (3.3 METs), moderate (4 METs), and vigorous activity (8 METs). Physical activity levels are classified as:

    Physically inactive: <600 MET-min/week Low activity: 600-3000 MET-min/week Adequate activity: >3000 MET-min/week The Turkish IPAQ forms are validated for reliability.

    Measured: Baseline

  2. Auditory Reaction Time Test

    Auditory reaction time will be assessed using the playback.fm test (https://playback.fm/audio-reaction-time). Participants will press the "spacebar" on the keyboard upon hearing a sound. The test consists of five trials, and the average reaction time (ms) will be calculated from the recorded results.

    Measured: Baseline

  3. Visual Reaction Time Test

    Visual reaction time will be assessed using the "Reaction Time" test on the Human Benchmark website (https://humanbenchmark.com/tests/reactiontime). Participants will press a button as soon as the screen turns green. The test consists of five trials, and the average reaction time (ms) will be calculated from the recorded results.

    Measured: Baseline

  4. Hand-Eye Coordination

    The hand-eye coordination assessment is performed with the "Aim Reaction" test. The test is called "Aim Trainer" and is available on the website (https://humanbenchmark.com/tests/aim). At the beginning of the test, the participant tries to hit 30 targets on the screen as quickly and accurately as possible. After completing the test, the mean time to hit each target is displayed in milliseconds (ms)

    Measured: Baseline

  5. Scapular Dyskinesis Assessment

    Scapular dyskinesis will be assessed using a digital caliper based on the Kibler method, which has shown moderate to high reliability. The distance between the inferior angle of the scapula and the spinous process of the 7th thoracic vertebra (scapular distance) will be measured in centimeters (cm) across three positions:

    Arms at sides (0° abduction) Hands on iliac crest (45° abduction) 90° shoulder abduction with internal rotation Measurements are taken with the caliper's distal arm at the scapula's inferior angle and the proximal arm at the spinous process. Participants remain relaxed and focus on a fixed point. A ≥1.5 cm difference between scapulae indicates dyskinesis. The mean scapular distance is recorded for analysis.

    Measured: Baseline

  6. Posture Assessment

    Posture will be assessed using the mobile application "PostureScreen," employing the photographic method. The application calculates posture based on reference points marked on the anterior, posterior, and lateral aspects of a photograph. These reference points, along with athlete and assessor positioning, follow the guidelines outlined in the 2018 study by Iacob et al. The method is validated and reliable, with ICC scores ranging from 0.71 to 0.99.

    The application measures anterior and posterior shifts and tilts of the head, shoulders, chest, and hips, as well as lateral shifts and tilts of the head, shoulders, and hips. The total shift and tilt values are calculated as the sum of these measurements. These values will be used to generate a report detailing the participant's posture and its deviation from normal posture.

    Measured: Baseline

  7. Shoulder Joint Position Sense

    Shoulder joint position sense will be assessed using the "Clinometer" smartphone application (ICC = 0.98). The assessment follows a 5-minute warm-up with calisthenic exercises for the glenohumeral and scapulothoracic joints.

    The participant will be tested in shoulder flexion positions of 55°, 90°, and 125°. The smartphone is fixed between the shoulder and elbow to minimize deviations. The 55° position is first practiced with eyes open, then with eyes closed, holding for 10 seconds before returning to the starting position. The participant then identifies the target angle (55°) with eyes closed, responding with "OK" once reached. This process is repeated six times with 5-second rests between trials. Deviations from the target angle are recorded as absolute errors. The same procedure is followed for 90° and 125° flexion, for both arms.

    Measured: Baseline

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted26 Feb 2025
  2. Study start1 Sep 2023
  3. Primary completion1 Oct 2024
  4. Study completion1 Nov 2024

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
Observational model
Case-control
Time perspective
Cross-sectional
Enrolment
27 participants (actual)
Target duration
1 Month
IDs, dates and publications
ClinicalTrials.gov ID
NCT06848114
Sponsor's protocol ID
HUOBayrak
Status last verified
Feb 2025
First submitted
21 Feb 2025
Last updated
28 Feb 2025
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Yes

Publications

  • Werner BC, Holzgrefe RE, Griffin JW, Lyons ML, Cosgrove CT, Hart JM, Brockmeier SF. Validation of an innovative method of shoulder range-of-motion measurement using a smartphone clinometer application. J Shoulder Elbow Surg. 2014 Nov;23(11):e275-82. doi: 10.1016/j.jse.2014.02.030. Epub 2014 Jun 9.

    PubMed 24925699
  • Stewart HJ, Martinez JL, Perdew A, Green CS, Moore DR. Auditory cognition and perception of action video game players. Sci Rep. 2020 Sep 1;10(1):14410. doi: 10.1038/s41598-020-71235-z.

    PubMed 32873819
  • Saglam M, Arikan H, Savci S, Inal-Ince D, Bosnak-Guclu M, Karabulut E, Tokgozoglu L. International physical activity questionnaire: reliability and validity of the Turkish version. Percept Mot Skills. 2010 Aug;111(1):278-84. doi: 10.2466/06.08.PMS.111.4.278-284.

    PubMed 21058606
  • Keleş E, Şimşek E, Salmani M, Tarsuslu Şimşek T, Angın S, Yakut Y. (2016). Eklem hareket açıklığı ölçümünde kullanılan iki akıllı telefon uygulamasının uygulayıcı içi ve uygulayıcılar arası güvenirliğinin incelenmesi. J Exerc Ther Rehabil,3(1):21-29.

  • Jenny, S. E., Manning, R. D., Keiper, M. C., Olrich, T. W. (2017). Virtual (ly) athletes: Where eSports fit within the definition of "sport". Quest, 69(1), 1-18.

  • Hopkins, B. C. B. (2014). Validity of PostureScreen Mobile® in the measurement of standing posture.

  • Hogan C, Corbett JA, Ashton S, Perraton L, Frame R, Dakic J. Scapular Dyskinesis Is Not an Isolated Risk Factor for Shoulder Injury in Athletes: A Systematic Review and Meta-analysis. Am J Sports Med. 2021 Aug;49(10):2843-2853. doi: 10.1177/0363546520968508. Epub 2020 Nov 19.

    PubMed 33211975
  • Hickey D, Solvig V, Cavalheri V, Harrold M, Mckenna L. Scapular dyskinesis increases the risk of future shoulder pain by 43% in asymptomatic athletes: a systematic review and meta-analysis. Br J Sports Med. 2018 Jan;52(2):102-110. doi: 10.1136/bjsports-2017-097559. Epub 2017 Jul 22.

    PubMed 28735288
  • Cretenoud AF, Barakat A, Milliet A, Choung OH, Bertamini M, Constantin C, Herzog MH. How do visual skills relate to action video game performance? J Vis. 2021 Jul 6;21(7):10. doi: 10.1167/jov.21.7.10.

    PubMed 34269794
  • Bloomer RJ, Martin KR, Pence JC. Impact of AmaTea(R) Max on physiological measures and gaming performance in active gamers: A placebo-controlled, double-blind, randomized study. J Clin Transl Res. 2022 Mar 1;8(2):93-102. eCollection 2022 Apr 29.

    PubMed 35392125

Questions about this trial

What is this clinical trial studying?

An observational study of Scapular Dyskinesis and Shoulder Proprioception, run by Ömer Bayrak 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 1 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 28 Feb 2025. 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?

The International Physical Activity Questionnaire (IPAQ) (time frame: Baseline). The study lists 7 primary outcomes in all. 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 NCT06848114, which also lists 10 linked publications.

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 28 Feb 2025.

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