Rate of EMG Rise and Rate of Force Development of Scapular Muscles

NCT05424185 | Unknown

• 1 other identifier: 202201029RINB
• Study Type: observational
• Target: 40
• Locations: 1 country
• Sites: 1

Brief Summary

The investigators will clarify rate of electromyography (EMG) rise and rate of force development in overhead athletes on scapular muscles, including upper trapezius, lower trapezius and serratus anterior. The correlation between rate of EMG rise and rate of force development will also be examined.

Conditions

Scapular Dyskinesis

Keywords

overhead athletes; electromyography

Outcome Measures

Primary Outcomes (2)

• Rate of EMG rise

  Surface EMG electrodes (The Ludlow Company LP, Chocopee, MA) were placed after shaving and preparation with alcohol to decrease skin impedance (typically 10 kΩ or less). An impedance meter (Model F-EZM5, Astro-Med Inc., Ri, USA) will be used to measure impedance between the electrodes and skin over the muscle. Bipolar surface EMG electrodes with an interelectrode (center-to-center) distance of 20 mm will be placed upper trapezius, lower trapezius and serratus anterior of the dominant shoulder. Electrodes for upper trapezius were placed midway between acromion and the seventh spinous process of cervical vertebrae. The lower trapezius was palpated obliquely upward and laterally along the line between intersection of the spine of scapula and the seventh spinous process of thoracic vertebrae. Electrodes for serratus anterior was placed anterior to the latissimus dorsi and posterior to pectoralis major. The reference electrode was placed on the ipsilateral clavicle

  Baseline

• rate of force development

  The force-sensitive measurement system (FlexiForce ELFTM, New Taipei City, Taiwan, R.O.C.) will be used for force detection. It combines three single-point FlexiForce B201 sensors, one handle containing USB-interface electronics, and Windows-compatible software (Figure 2). Three circle sensors (diameter 9.53 mm; thickness 0.203 mm) are able to detect therange of force as low (4.4-111N), medium (111-667N) and, high level (667-4448N), respectively. This ensures that the various force during measurement can be measured by the appropriate sensor. When the sensor detects the force, the software will display the histogram, curve graph, or number of the force detected as the real-time bio-feedback. The sampling rate of the data collection is set at 200Hz.

  Baseline

Secondary Outcomes (1)

• Posterior displacement of the scapula

  Baseline

Study Arms (4)

type 1 scapular dyskinesis

type 1 scapular dyskinesis classified by dyskinesis classification test

Behavioral: different type of scapular dyskinesis

type 2 scapular dyskinesis

type 2 scapular dyskinesis classified by dyskinesis classification test

Behavioral: different type of scapular dyskinesis

type 3 scapular dyskinesis

type 3 scapular dyskinesis classified by dyskinesis classification test

Behavioral: different type of scapular dyskinesis

type 4 scapular dyskinesis

type 4 scapular dyskinesis classified by dyskinesis classification test

Behavioral: different type of scapular dyskinesis

Interventions

different type of scapular dyskinesis BEHAVIORAL

rapid arm elevation to see the different of EMG rise and force development

type 1 scapular dyskinesis; type 2 scapular dyskinesis; type 3 scapular dyskinesis; type 4 scapular dyskinesis

Eligibility Criteria

• Age: 20 Years - 40 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)
• Sampling Method: Non-Probability Sample

Study Population

Scapular dyskinesis is defined as abnormal scapular position and motion. It can be divided in 4 patterns. It has been reported that overhead athletes have higher prevalence (61%) compare to non-overhead athletes (33%). Additionally, athletes with scapular dyskinesis have 43% greater risk of developing shoulder pain than those without scapular dyskinesis. Due to higher prevalence with greater injury risk, scapular dyskinesis plays the important role of injury process that need to be concerned for the overhead athletes.

You may qualify if:

• Playing overhead sports for at least 1 year.
• Still active in training or competition.
• The frequency of training or game should be at least 2 times per week, 1 hour per time.

You may not qualify if:

• Subjects with shoulder pain onset due to trauma, a history of shoulder fractures or dislocation, cervical radiculopathy, degenerative joint disease of the shoulder, surgical interventions on the shoulder, or inflammatory arthropathy.
• Visual analog scale (VAS) \> 5 during movement in the experiment.

Sponsors & Collaborators

• National Taiwan University Hospital: lead

Study Sites (1)

National Taiwan University Hospital

Taipei, 100, Taiwan

Location

Related Publications (1)

• 1. Kibler WB, Ludewig PM, McClure PW, Michener LA, Bak K, Sciascia AD. Clinical implications of scapular dyskinesis in shoulder injury: the 2013 consensus statement from the 'Scapular Summit'. Br J Sports Med 2013;47:877-85. 2. Huang TS, Huang HY, Wang TG, Tsai YS, Lin JJ. Comprehensive classification test of scapular dyskinesis: A reliability study. Manual therapy 2015;20:427-32. 3. McClure P, Tate AR, Kareha S, Irwin D, Zlupko E. A clinical method for identifying scapular dyskinesis, part 1: reliability. J Athl Train 2009;44:160-4. 4. Burn MB, McCulloch PC, Lintner DM, Liberman SR, Harris JD. Prevalence of Scapular Dyskinesis in Overhead and Nonoverhead Athletes: A Systematic Review. Orthopaedic journal of sports medicine 2016;4:2325967115627608. 5. 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;52:102-10. 6. Longo UG, Risi Ambrogioni L, Berton A, Candela V, Massaroni C, Carnevale A, et al. Scapular Dyskinesis: From Basic Science to Ultimate Treatment. Int J Environ Res Public Health 2020;17. 7. Huang TS, Ou HL, Huang CY, Lin JJ. Specific kinematics and associated muscle activation in individuals with scapular dyskinesis. Journal of shoulder and elbow surgery 2015;24:1227-34. 8. Ou HL, Huang TS, Chen YT, Chen WY, Chang YL, Lu TW, et al. Alterations of scapular kinematics and associated muscle activation specific to symptomatic dyskinesis type after conscious control. Manual therapy 2016;26:97-103. 9. Huang TS, Du WY, Wang TG, Tsai YS, Yang JL, Huang CY, et al. Progressive conscious control of scapular orientation with video feedback has improvement in muscle balance ratio in patients with scapular dyskinesis: a randomized controlled trial. Journal of shoulder and elbow surgery 2018;27:1407-14. 10. Lawrence JH, De Luca CJ. Myoelectric signal versus force relationship in different human muscles. Journal of applied physiology: respiratory, environmental and exercise physiology 1983;54:1653-9. 11. Jay K, Schraefel M, Andersen CH, Ebbesen FS, Christiansen DH, Skotte J, et al. Effect of brief daily resistance training on rapid force development in painful neck and shoulder muscles: randomized controlled trial. Clin Physiol Funct Imaging 2013;33:386-92. 12. Andersen LL, Andersen JL, Suetta C, Kjaer M, Søgaard K, Sjøgaard G. Effect of contrasting physical exercise interventions on rapid force capacity of chronically painful muscles. J Appl Physiol (1985) 2009;107:1413-9. 13. Andersen LL, Holtermann A, Jørgensen MB, Sjøgaard G. Rapid muscle activation and force capacity in conditions of chronic musculoskeletal pain. Clin Biomech (Bristol, Avon) 2008;23:1237-42. 14. Andersen LL, Nielsen PK, Søgaard K, Andersen CH, Skotte J, Sjøgaard G. Torque-EMG-velocity relationship in female workers with chronic neck muscle pain. Journal of biomechanics 2008;41:2029-35. 15. Weon JH, Kwon OY, Cynn HS, Lee WH, Kim TH, Yi CH. Real-time visual feedback can be used to activate scapular upward rotators in people with scapular winging: an experimental study. J Physiother 2011;57:101-7. 16. Alberta FG, ElAttrache NS, Bissell S, Mohr K, Browdy J, Yocum L, et al. The development and validation of a functional assessment tool for the upper extremity in the overhead athlete. The American journal of sports medicine 2010;38:903-11. 17. Oh JH, Kim JY, Limpisvasti O, Lee TQ, Song SH, Kwon KB. Cross-cultural adaptation, validity and reliability of the Korean version of the Kerlan-Jobe Orthopedic Clinic shoulder and elbow score. JSES open access 2017;1:39-44.

  BACKGROUND

Study Officials

• Jiu-Jenq Lin, PhD

  National Taiwan University Hospital

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Jiu-Jenq Lin, PhD

CONTACT

02-33668126; jjlin@ntu.edu.tw

Yi-Hsuan Weng, MS

CONTACT

02-33668126

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: CROSS SECTIONAL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: June 14, 2022
• First Posted: June 21, 2022
• Study Start: July 1, 2022
• Primary Completion: September 1, 2022
• Study Completion: December 31, 2022
• Last Updated: June 24, 2022

Record last verified: 2022-06

Locations

TW (1)