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

2026年8月9日 更新者：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.

調査の概要

状態

募集

条件

介入・治療

詳細な説明

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.

研究の種類

介入

入学 (推定)

60

段階

  • 適用できない

連絡先と場所

このセクションには、調査を実施する担当者の連絡先の詳細と、この調査が実施されている場所に関する情報が記載されています。

研究連絡先

研究場所

  • トルコ（Türkiye）
    • MErkez
      • Elâzığ、MErkez、トルコ（Türkiye）、23200
        • 募集
        • Firat University
        • コンタクト：
        • コンタクト：
          • Muhammet Şahin Elbastı, MD
        • 主任研究者：
          • Muhammet Şahin Elbastı, MD

参加基準

研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。

適格基準

就学可能な年齢

  • 大人
  • 高齢者

健康ボランティアの受け入れ

いいえ

説明

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

研究計画

このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。

研究はどのように設計されていますか？

デザインの詳細

  • 主な目的：処理
  • 割り当て：ランダム化
  • 介入モデル：並列代入
  • マスキング：独身

武器と介入

参加者グループ / アーム
介入・治療
アクティブコンパレータ：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.
他の：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.
他の：Standard Physiotherapy Program
Includes therapeutic ultrasound, transcutaneous electrical nerve stimulation (TENS), and standard shoulder rehabilitation exercises applied to all participants.
アクティブコンパレータ：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.
他の：Standard Physiotherapy Program
Includes therapeutic ultrasound, transcutaneous electrical nerve stimulation (TENS), and standard shoulder rehabilitation exercises applied to all participants.
他の：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.

この研究は何を測定していますか？

主要な結果の測定

結果測定
メジャーの説明
時間枠
Change in Supraspinatus Muscle Pennation Angle
時間枠：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

二次結果の測定

結果測定
メジャーの説明
時間枠
Change in Supraspinatus Muscle Fiber Length
時間枠：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
時間枠：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)
時間枠：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
時間枠：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
時間枠：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)
時間枠：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)
時間枠：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)
時間枠：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

協力者と研究者

ここでは、この調査に関係する人々や組織を見つけることができます。

スポンサー

Firat University

協力者

Elazıg Fethi Sekin Sehir Hastanesi

研究記録日

これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。

主要日程の研究

研究開始 (推定)

2026年7月20日

一次修了 (推定)

2026年11月20日

研究の完了 (推定)

2027年11月20日

試験登録日

最初に提出

2026年4月27日

QC基準を満たした最初の提出物

2026年5月7日

最初の投稿 (実際)

2026年5月14日

学習記録の更新

投稿された最後の更新 (実際)

2026年8月11日

QC基準を満たした最後の更新が送信されました

2026年8月9日

最終確認日

2026年8月1日

詳しくは

本研究に関する用語

キーワード

追加の関連 MeSH 用語

その他の研究ID番号

  • FU_MGBeydagi_RC_B_2026/05

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個々の参加者データ (IPD) を共有する予定はありますか?

いいえ

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いいえ

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