Development of the Muscle Architecture Based Isokinetic Strength Assessment Position for Shoulder Rotator Muscles

NCT ID: NCT04755257

Last Updated: 2021-02-16

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 52 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2019-11-15
• Study Completion Date: 2020-05-15

Brief Summary

Today, the most commonly used position is the seated position with 45° of shoulder abduction (Abd) in the scapular plane, known as the most functional isokinetic assessment of shoulder-rotator strength (1). However, considering the architectural feature of the rotator muscles, a position where the maximum sarcomere length is obtained, in which the maximum muscle strength is produced, has not been investigated. Ward et al. showed that the shoulder position, in which the sarcomere length of the muscles was between 2.0 - 2.6 µm, was 25⁰ Abd and 20⁰ external rotation (ER) as a result of their study on the rotator cuff muscles architecture (2). The test position selected in isokinetic measurements is the main factor for outcome measurements and the repeatability of the measurements directly depends on the selected position (3). This study was planned to investigate the effects of the position where the shoulder is at 25⁰ Abd and 20⁰ ER to develop the most suitable isokinetic strength evaluation position based on muscle architecture for shoulder rotator muscles.Using IsoMed 2000 device (D. & R. Ferstl GmbH, Hemau, Germany) we conducted the isokinetic test of concentric (CON) and eccentric (ECC) shoulder internal (IR) and external (ER) strength at the angular velocity of 60˚/s in both Method I (scapular position) and Method II (25⁰ Abd and 20⁰ ER). There were seven days between the testing sessions, and both tests were conducted at the same time of day. The same examiner with experience in performing isokinetic testing with IsoMed 2000 tested all subjects in both testing sessions

Conditions

Muscle Architecture; Shoulder; Isokinetic; Rotator Muscle

Study Design

• Observational Model Type: OTHER
• Study Time Perspective: PROSPECTIVE

Interventions

Isokinetic test

Using IsoMed 2000 device (D. \& R. Ferstl GmbH, Hemau, Germany) we conducted the isokinetic test of concentric (CON) and eccentric (ECC) shoulder internal (IR) and external (ER) strength at the angular velocity of 60˚/s in both Method I (scapular position) and Method II (25⁰ Abd and 20⁰ ER). There were seven days between the testing sessions, and both tests were conducted at the same time of day. The same examiner with experience in performing isokinetic testing with IsoMed 2000 tested all subjects in both testing sessions.

Intervention Type: DEVICE

Eligibility Criteria

Inclusion Criteria

• Being between the ages of 18-25
• Body mass index (BMI) being between 18.5-24.9 kg / m 2
• Volunteering to participate in the study
• Having the skills to do the tests and exercises to be applied

Exclusion Criteria

• Having a history of upper extremity injury within the past year
• Having a sensory problem that prevents participation in the study
• Have any musculoskeletal, neurological, respiratory, or cardiovascular risk factors that limit exercise
• Having a history of malignant disease

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 25 Years
• Eligible Sex: MALE
• Accepts Healthy Volunteers: No

Sponsors

Ankara Yildirim Beyazıt University

OTHER

Sponsor Role: lead

Responsible Party

caglar soylu

Çağlar Soylu (Principal Investigator)

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Caglar Soylu, PhD

Role: PRINCIPAL_INVESTIGATOR

Ankara Yildirim Beyazıt University

Locations

Ankara Yıldırım Beyazıt University, Faculty of Health Sciences, Department of Physiotherapy and Rehabilitation

Ankara, Etlik, Turkey (Türkiye)

Countries

Turkey (Türkiye)

Other Identifiers

2019-367

Identifier Type: -

Identifier Source: org_study_id