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

NCT04755257 | Completed DMC

• 1 other identifier: 2019-367
• Study Type: observational
• Target: 52
• Locations: 1 country
• Sites: 1

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

Keywords

Muscle Architecture; Shoulder; Isokinetic; Rotator muscle

Outcome Measures

Primary Outcomes (8)

• concentric shoulder internal rotation peak torque and peak torque/weight at the angular velocity of 60˚/s in Method I (scapular position)

  concentric shoulder internal rotation peak torque and peak torque/weight at the angular velocity of 60˚/s in Method I (scapular position)

  Six month

• concentric shoulder external rotation peak torque and peak torque/weight at the angular velocity of 60˚/s in Method I (scapular position)

  concentric shoulder external rotation peak torque and peak torque/weight at the angular velocity of 60˚/s in Method I (scapular position)

  Six month

• concentric shoulder internal rotation peak torque and peak torque/weight at the angular velocity of 60˚/s in Method II (25⁰ Abd and 20⁰ ER)

  concentric shoulder internal rotation peak torque and peak torque/weight at the angular velocity of 60˚/s in Method II (25⁰ Abd and 20⁰ ER)

  Six month

• concentric shoulder external rotation peak torque and peak torque/weight at the angular velocity of 60˚/s in Method II (25⁰ Abd and 20⁰ ER)

  concentric shoulder external rotation peak torque and peak torque/weight at the angular velocity of 60˚/s in Method II (25⁰ Abd and 20⁰ ER)

  Six month

• eccentric shoulder internal rotation peak torque and peak torque/weight at the angular velocity of 60˚/s in Method I (scapular position)

  eccentric shoulder internal rotation peak torque and peak torque/weight at the angular velocity of 60˚/s in Method I (scapular position)

  Six month

• eccentric shoulder external rotation peak torque and peak torque/weight at the angular velocity of 60˚/s in Method I (scapular position)

  eccentric shoulder external rotation peak torque and peak torque/weight at the angular velocity of 60˚/s in Method I (scapular position)

  Six month

• eccentric shoulder internal rotation peak torque and peak torque/weight at the angular velocity of 60˚/s in Method II (25⁰ Abd and 20⁰ ER)

  eccentric shoulder internal rotation peak torque and peak torque/weight at the angular velocity of 60˚/s in Method II (25⁰ Abd and 20⁰ ER)

  Six month

• eccentric shoulder external rotation peak torque and peak torque/weight at the angular velocity of 60˚/s in Method II (25⁰ Abd and 20⁰ ER)

  eccentric shoulder external rotation peak torque and peak torque/weight at the angular velocity of 60˚/s in Method II (25⁰ Abd and 20⁰ ER)

  Six month

Interventions

Isokinetic test DEVICE

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.

Eligibility Criteria

• Age: 18 Years - 25 Years
• Gender Eligibility Details: healthy male subjects
• Age Groups: Adult (18-64)
• Sampling Method: Probability Sample

Study Population

healthy male subjects

You may qualify if:

• 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

You may not qualify if:

• 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

Sponsors & Collaborators

• Ankara Yildirim Beyazıt University: lead

Study Sites (1)

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

Ankara, Etlik, 06010, Turkey (Türkiye)

Location

Study Officials

• Caglar Soylu, PhD

  Ankara Yildirim Beyazıt University

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: OTHER
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Çağlar Soylu (Principal Investigator)

Study Record Dates

• First Submitted: February 11, 2021
• First Posted: February 16, 2021
• Study Start: November 15, 2019
• Primary Completion: January 15, 2020
• Study Completion: May 15, 2020
• Last Updated: February 16, 2021

Record last verified: 2021-02

Data Sharing

• IPD Sharing: Will not share

Locations

TU (1)