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Concentric vs Eccentric Full Can Exercise in Partial Rotator Cuff Tears (FULLCAN-PRCT)

2026년 8월 9일 업데이트: Muharrem Gökhan Beydağı, Firat University

Comparison of the Effects of Concentric and Eccentric Full Can Exercises on Supraspinatus Muscle Architecture in Individuals With Partial Rotator Cuff Tears

This study aims to compare the effects of concentric and eccentric full can exercises on supraspinatus muscle architecture in individuals with partial rotator cuff tears.

Rotator cuff tears are a common cause of shoulder pain and functional limitation. The supraspinatus muscle plays a key role in shoulder movement and stability, and its structure may be affected in individuals with partial tears.

Exercise-based rehabilitation is widely used in the conservative management of these conditions. The full can exercise is commonly prescribed to selectively activate the supraspinatus muscle. However, the effects of different contraction types, specifically concentric and eccentric exercises, on muscle structure and clinical outcomes are not fully understood.

In this study, participants will be randomly assigned to either a concentric or eccentric full can exercise group. Both groups will receive a standard physiotherapy program, including therapeutic ultrasound and transcutaneous electrical nerve stimulation (TENS), in addition to the assigned exercise protocol.

The intervention will last for 6 weeks, with sessions performed three times per week. Outcomes will be assessed before and after the intervention.

The primary outcome is the change in supraspinatus muscle pennation angle measured by ultrasound imaging. Secondary outcomes include muscle architecture parameters, pain intensity, range of motion, muscle strength, functional status, and kinesiophobia.

The findings of this study may help improve exercise selection in the rehabilitation of individuals with rotator cuff tears.

연구 개요

상태

모병

정황

개입 / 치료

상세 설명

Study Design and Setting This study is designed as a prospective, randomized, assessor-blinded, parallel-group clinical trial. The study will be conducted at Firat University Faculty of Health Sciences, Department of Physiotherapy and Rehabilitation, and Fethi Sekin City Hospital, Department of Physical Medicine and Rehabilitation.

Participants A total of 60 individuals aged between 18 and 65 years with a diagnosis of partial supraspinatus tendon tear confirmed by ultrasound or magnetic resonance imaging will be included. Participants will be randomly allocated into two groups (n=30 per group).

Randomization and Blinding Participants will be assigned to groups using a computer-generated randomization sequence. Allocation will be concealed using sealed, opaque envelopes. Outcome assessments will be performed by a blinded assessor.

Interventions

Both groups will receive a standard physiotherapy program including:

Therapeutic ultrasound Transcutaneous electrical nerve stimulation (TENS) Standard shoulder rehabilitation exercises

The only difference between groups will be the contraction type of the full can exercise:

Concentric Group: Emphasis on the lifting phase (approximately 2 seconds), with minimal eccentric loading Eccentric Group: Emphasis on the lowering phase (approximately 4 seconds), with minimal concentric loading

All interventions will be applied 3 times per week for 6 weeks (total of 18 sessions).

Outcome Measures

Primary Outcome:

Supraspinatus muscle pennation angle measured by B-mode ultrasonography

Secondary Outcomes:

Muscle architecture parameters (fiber length, physiological cross-sectional area) Pain intensity (Visual Analog Scale) Range of motion (goniometric assessment) Muscle strength (hand-held dynamometry) Functional status (DASH, SPADI) Kinesiophobia (Tampa Scale of Kinesiophobia)

Assessments will be performed at baseline (T0) and at the end of the 6-week intervention (T1).

Sample Size and Statistical Analysis Sample size calculation was based on the primary outcome (pennation angle change), assuming an effect size of 0.70, alpha of 0.05, and power of 80%. A minimum of 26 participants per group was required; therefore, 30 participants per group will be recruited to account for potential dropouts.

Data will be analyzed using appropriate statistical methods including mixed-design ANOVA for group and time comparisons. Non-parametric tests will be used if assumptions are not met. Intention-to-treat analysis will be applied.

Ethical Considerations The study will be conducted in accordance with ethical principles for human research. Informed consent will be obtained from all participants prior to inclusion.

연구 유형

중재적

등록 (추정된)

60

단계

  • 해당 없음

연락처 및 위치

이 섹션에서는 연구를 수행하는 사람들의 연락처 정보와 이 연구가 수행되는 장소에 대한 정보를 제공합니다.

연구 연락처

연구 장소

  • 터키 (Türkiye)
    • MErkez
      • Elâzığ, MErkez, 터키 (Türkiye), 23200
        • 모병
        • Firat University
        • 연락하다:
        • 연락하다:
          • Muhammet Şahin Elbastı, MD
        • 수석 연구원:
          • Muhammet Şahin Elbastı, MD

참여기준

연구원은 적격성 기준이라는 특정 설명에 맞는 사람을 찾습니다. 이러한 기준의 몇 가지 예는 개인의 일반적인 건강 상태 또는 이전 치료입니다.

자격 기준

공부할 수 있는 나이

  • 성인
  • 고령자

건강한 자원 봉사자를 받아들입니다

아니

설명

Inclusion Criteria:

  • Aged between 18 and 65 years
  • Diagnosed with partial supraspinatus tendon tear confirmed by ultrasound or magnetic resonance imaging
  • Shoulder pain lasting at least 3 months
  • Pain intensity ≥3 on the Visual Analog Scale (VAS)
  • Willing to participate and provide informed consent

Exclusion Criteria:

  • Full-thickness rotator cuff tear
  • History of shoulder surgery
  • Shoulder instability
  • Neurological disorders
  • Rheumatological diseases
  • Corticosteroid injection within the last 3 months
  • Inability to adhere to the exercise program

공부 계획

이 섹션에서는 연구 설계 방법과 연구가 측정하는 내용을 포함하여 연구 계획에 대한 세부 정보를 제공합니다.

연구는 어떻게 설계됩니까?

디자인 세부사항

  • 주 목적: 치료
  • 할당: 무작위
  • 중재 모델: 병렬 할당
  • 마스킹: 하나의

무기와 개입

참가자 그룹 / 팔
개입 / 치료
활성 비교기: Concentric Exercise Group
Participants will receive a standard physiotherapy program including ultrasound, TENS, and shoulder rehabilitation exercises, combined with concentric full can exercises. The concentric phase (lifting) will be emphasized, while the eccentric phase will be minimally loaded.
다른: Concentric Full Can Exercise
A strengthening exercise performed in the scapular plane with emphasis on the eccentric phase. The lowering phase is performed slowly in approximately 4 seconds against resistance, while the concentric phase is minimized. Exercises are performed 3 times per week for 6 weeks.
다른: Standard Physiotherapy Program
Includes therapeutic ultrasound, transcutaneous electrical nerve stimulation (TENS), and standard shoulder rehabilitation exercises applied to all participants.
활성 비교기: Eccentric Exercise Group
Participants will receive a standard physiotherapy program including ultrasound, TENS, and shoulder rehabilitation exercises, combined with eccentric full can exercises. The eccentric phase (lowering) will be emphasized, while the concentric phase will be minimally loaded.
다른: Standard Physiotherapy Program
Includes therapeutic ultrasound, transcutaneous electrical nerve stimulation (TENS), and standard shoulder rehabilitation exercises applied to all participants.
다른: Eccentric Full Can Exercise
A strengthening exercise performed in the scapular plane with emphasis on the eccentric phase. The lowering phase is performed slowly in approximately 4 seconds against resistance, while the concentric phase is minimized. Exercises are performed 3 times per week for 6 weeks.

연구는 무엇을 측정합니까?

주요 결과 측정

결과 측정
측정값 설명
기간
Change in Supraspinatus Muscle Pennation Angle
기간: Baseline and 6 weeks

The pennation angle of the supraspinatus muscle will be measured using B-mode ultrasonography. Measurements will be obtained at baseline (T0) and after 6 weeks (T1). The change between time points will be analyzed.

Supraspinatus Muscle Pennation Angle:

  • Assessed by B-mode ultrasonography.
  • Pennation angle will be measured in degrees (°).
  • Higher values indicate greater muscle architectural adaptation.
  • Measured at baseline (T0) and after 6 weeks of intervention (T1).
Baseline and 6 weeks

2차 결과 측정

결과 측정
측정값 설명
기간
Change in Supraspinatus Muscle Fiber Length
기간: Baseline and 6 weeks

Measured using B-mode ultrasonography at baseline and after 6 weeks.

Supraspinatus Fascicle Length:

  • Measured using B-mode ultrasonography in millimeters (mm).
  • Greater fascicle length may indicate improved muscle architectural properties.
  • Assessed at baseline and 6 weeks.
Baseline and 6 weeks
Change in Physiological Cross-Sectional Area of Supraspinatus
기간: Baseline and 6 weeks

Measured via ultrasound imaging at baseline and after 6 weeks.

Physiological Cross-Sectional Area (PCSA):

  • Measured using ultrasonography in cm².
  • Higher values indicate greater muscle size.
  • Assessed at baseline and 6 weeks.
Baseline and 6 weeks
Change in Pain Intensity (VAS)
기간: Baseline and 6 weeks

Pain intensity will be assessed using the Visual Analog Scale (0-10 cm).

Visual Analog Scale for Pain:

  • Pain intensity will be assessed using the Visual Analog Scale (VAS).
  • The scale ranges from 0 to 10.
  • 0 indicates no pain and 10 indicates worst imaginable pain.
  • Higher scores indicate worse pain severity.
  • Assessed at baseline and 6 weeks.
Baseline and 6 weeks
Change in Shoulder Range of Motion
기간: Baseline and 6 weeks

Measured using a goniometer for flexion, abduction, internal and external rotation.

Shoulder Range of Motion:

  • Active shoulder flexion, abduction, internal rotation, and external rotation will be measured using a universal goniometer in degrees (°).
  • Higher values indicate greater joint mobility.
  • Assessed at baseline and 6 weeks.
Baseline and 6 weeks
Change in Shoulder Muscle Strength
기간: Baseline and 6 weeks

Measured using a hand-held dynamometer during isometric contraction. Shoulder Muscle Strength

  • Isometric muscle strength will be assessed using a handheld dynamometer.
  • Measurements will be recorded in kilograms or Newtons.
  • Higher values indicate greater muscle strength.
  • Assessed at baseline and 6 weeks.
Baseline and 6 weeks
Change in Functional Status (DASH Scores)
기간: Baseline and 6 weeks

Functional status will be assessed using DASH questionnaires. Disabilities of the Arm, Shoulder and Hand (DASH) Score

  • Functional disability will be assessed using the DASH questionnaire.
  • Scores range from 0 to 100.
  • Higher scores indicate greater disability.
  • Assessed at baseline and 6 weeks.
Baseline and 6 weeks
Change in Functional Status (SPADI Scores)
기간: Baseline and 6 weeks

Functional status will be assessed using SPADI questionnaires.

Shoulder Pain and Disability Index (SPADI):

  • Shoulder-related pain and disability will be assessed using SPADI.
  • Scores range from 0 to 100.
  • Higher scores indicate greater pain and disability.
  • Assessed at baseline and 6 weeks.
Baseline and 6 weeks
Change in Kinesiophobia (Tampa Scale)
기간: Baseline and 6 weeks

Measured using the Tampa Scale of Kinesiophobia.

Tampa Scale for Kinesiophobia:

  • Fear of movement will be assessed using the Tampa Scale for Kinesiophobia.
  • Scores range from 17 to 68.
  • Higher scores indicate greater kinesiophobia.
  • Assessed at baseline and 6 weeks.
Baseline and 6 weeks

공동 작업자 및 조사자

여기에서 이 연구와 관련된 사람과 조직을 찾을 수 있습니다.

스폰서

Firat University

협력자

Elazıg Fethi Sekin Sehir Hastanesi

연구 기록 날짜

이 날짜는 ClinicalTrials.gov에 대한 연구 기록 및 요약 결과 제출의 진행 상황을 추적합니다. 연구 기록 및 보고된 결과는 공개 웹사이트에 게시되기 전에 특정 품질 관리 기준을 충족하는지 확인하기 위해 국립 의학 도서관(NLM)에서 검토합니다.

연구 주요 날짜

연구 시작 (추정된)

2026년 7월 20일

기본 완료 (추정된)

2026년 11월 20일

연구 완료 (추정된)

2027년 11월 20일

연구 등록 날짜

최초 제출

2026년 4월 27일

QC 기준을 충족하는 최초 제출

2026년 5월 7일

처음 게시됨 (실제)

2026년 5월 14일

연구 기록 업데이트

마지막 업데이트 게시됨 (실제)

2026년 8월 11일

QC 기준을 충족하는 마지막 업데이트 제출

2026년 8월 9일

마지막으로 확인됨

2026년 8월 1일

추가 정보

이 연구와 관련된 용어

키워드

추가 관련 MeSH 약관

기타 연구 ID 번호

  • FU_MGBeydagi_RC_B_2026/05

개별 참가자 데이터(IPD) 계획

개별 참가자 데이터(IPD)를 공유할 계획입니까?

아니요

약물 및 장치 정보, 연구 문서

미국 FDA 규제 의약품 연구

아니

미국 FDA 규제 기기 제품 연구

아니

이 정보는 변경 없이 clinicaltrials.gov 웹사이트에서 직접 가져온 것입니다. 귀하의 연구 세부 정보를 변경, 제거 또는 업데이트하도록 요청하는 경우 register@clinicaltrials.gov. 문의하십시오. 변경 사항이 clinicaltrials.gov에 구현되는 즉시 저희 웹사이트에도 자동으로 업데이트됩니다. .

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