Concentric vs Eccentric Full Can Exercise in Partial Rotator Cuff Tears

Condition(s) studied

Investigational drug(s) / intervention(s)

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.

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.

Standard Physiotherapy Program: Includes therapeutic ultrasound, transcutaneous electrical nerve stimulation (TENS), and standard shoulder rehabilitation exercises applied to all participants.

Study summary

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.

Eligibility

Primary outcome measure(s)

• Change in Supraspinatus Muscle Pennation Angle — 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).

Trial sites (1)

More Firat University trials in Turkey

Other trials for the same condition