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Atlas · Shoulder

Subscapularis

Subscapularis covers the front of the shoulder blade and contributes to internal rotation and cuff stability. Assess rotation strength and passive motion when reaching, dressing or pushing becomes painful.

Subscapularis
Body region
Shoulder
Trigger points
3
documented in this muscle
Common symptoms
3
patterns cataloged
Contributors
3
Factors to assess

Muscle overview

Symptoms and first steps

Practical first steps

  • Keep the arm supported for sleep if helpful.
  • Use comfortable shoulder motion and reduce heavy pushing during a flare.
  • Avoid deep armpit pressure.

When to seek assessment

  • Arrange prompt examination for traumatic weakness or inability to raise the arm.
  • Persistent night pain, increasing movement loss or neurological symptoms warrant reassessment.

External rotation lengthens subscapularis. Hand-behind-back motion is a combined movement and does not diagnose a shortened subscapularis.

Examination, palpation and treatment evidence

Illustrated overview

Subscapularis

Blue highlights the muscle. Crosses mark representative trigger-point sites; shaded areas show possible referred pain. These examples do not correspond one-to-one with the numbered points below. Patterns vary and cannot diagnose the cause of pain.

Illustrated overview

Subscapularis · Trigger-point examples 1

Representative source regions. The illustrated markers and pain pattern are not individual assignments to the numbered trigger points.

Open full-size image

Trigger points

1. TrP1

Location. Front of shoulder blade (deep)

Trigger point map
Subscapularis — Subscapularis · Trigger-point examples 1Open full-size image

Regional muscle reference; this is not an individual map of the selected numbered trigger point.

Referred pain map
Subscapularis — Referred pain mapOpen full-size image

Regional muscle reference; this is not an individual map of the selected numbered trigger point.

Pain referral. Back of shoulder, wrist

Pain Pattern

  • Back of shoulder
  • Wrist
  • Posterior shoulder

What This Pain Feels Like

A deep shoulder ache may accompany painful dressing, pushing or reaching. Comparing internal-rotation strength with passive external rotation helps distinguish a cuff problem from broader joint restriction.

What Patients Report

  • Pain when reaching to opposite shoulder
  • Difficulty tucking in shirt
  • Pain in back of shoulder
  • Wrist pain without injury

What Makes It Worse

  • Internal rotation
  • Reaching across body
  • Throwing
  • Swimming
  • Sleeping on affected side
Browse related exercises (3)

Symptoms patients report

Pain with inward rotation or pushing Compare a light belly press with other shoulder movements.

Dressing difficulty Reaching behind the back uses several joints and muscles.

Reduced shoulder rotation Record active and passive range separately.

Contributors to assess

Increased pushing or swimming load Review the change in volume and symptom timing.

Previous shoulder injury or surgery The specific injury/repair determines loading limits.

Cuff or joint disease May coexist with tenderness and needs its own assessment.

For clinicians and supervised training

Clinical reference

Shoulder restriction does not make subscapularis tenderness a cause of frozen shoulder. Wrist symptoms need their own regional assessment.

Anatomy and palpation

Anatomical relationships

The broad muscle arises from the subscapular fossa on the costal scapular surface and converges onto the lesser humeral tuberosity.[1]

  • Lateral scapular border orients the accessible muscle margin.
  • Lesser tuberosity is an anterior humeral tendon landmark, not the muscle belly.

Nearby structures. The axillary neurovascular bundle lies near the lateral approach; the chest wall lies deep. Most of the muscle is covered by the scapula and cannot be directly surface palpated.

Palpation

Patient position. Supine or side-lying with arm fully supported in a small comfortable amount of abduction.

Find the landmarks

  • Identify the lateral scapular border with the arm supported.
  • Distinguish the posterior axillary fold from the anterior pectoral fold; neither marks the whole deep subscapularis belly.

Examination sequence

  1. Explain the sensitive region and obtain consent.
  2. Use light contact only at an accessible lateral muscle margin, with a gentle internal-rotation effort for orientation.
  3. Release and compare familiar pain with a supported movement; document when direct assessment is not feasible.

Document the findings

  • Localized sensitivity is recorded without claiming the entire muscle was examined.

Limits and precautions

  • No deep axillary probing or ball pressure; stop for tingling or vascular symptoms.
[1]

Examination and tests

2

Active versus supported passive shoulder motion[2]

Distinguish painful effort from a substantial restriction of joint movement.

Position
Seated for active elevation; supine with scapula and arm supported for passive testing.
Technique
Record active elevation and external rotation, then gently compare examiner-assisted motion in the same planes. Note familiar pain, range and whether the shoulder blade substitutes early.
Positive finding
Active limitation with better passive range differs from marked restriction of both.
Interpretation
A large active/passive gap with weakness warrants cuff or nerve assessment; global passive restriction suggests a joint/capsular pathway.
Limitations
Pain, guarding and measurement position influence motion. Neither pattern identifies an individual trigger point.

Belly-press assessment[3][2]

Measure familiar pain and force during a defined shoulder effort.

Position
Seated with palm flat on the abdomen, wrist straight and elbow slightly forward.
Technique
Ask the patient to press the palm into the abdomen while keeping the elbow forward and wrist straight. Compare sides without forcing effort.
Positive finding
Familiar pain, reduced force or inability to hold the position compared with the other arm.
Interpretation
Elbow drift backward, wrist-flexion substitution or marked weakness prompts a subscapularis tendon assessment; a normal test does not exclude a tear.
Limitations
Pain inhibition and neighboring muscles affect performance. These are cuff-function findings, not trigger-point confirmation.

Distinguishing other causes

Rotator-cuff tear[3][2]

Findings that matter. New loss of strength after trauma, a lag sign or inability to raise the arm despite better passive motion.

Next step. Arrange timely examination and imaging when it will change management.

Adhesive capsulitis or glenohumeral arthritis[2]

Findings that matter. Several passive directions are restricted, especially external rotation; the limitation exceeds one painful effort.

Next step. Assess the joint and select movement/loading accordingly.

Subscapular nerve dysfunction or cervical nerve-root disorder[2]

Findings that matter. Weakness out of proportion to pain, visible muscle wasting, altered sensation or symptoms affected by neck movement.

Next step. Perform a neurological examination; consider electrodiagnostic or imaging assessment for a persistent objective deficit.

Treatment selection and progression

Self-care and activity

Adapt pushing and dressing during a flare[2]

Consider when. Assessed shoulder pain without acute traumatic weakness.

Keep loads close to the body, use the other arm to assist a difficult dressing step, and temporarily reduce heavy presses.

Dose and review
Try the change during the provoking task and review its effect on pain and task tolerance before continuing.
Progression
Restore the original tasks as range and effort improve.
Stop or reassess
Reduce the load for a lasting flare; new marked weakness, numbness or sharp injury pain requires reassessment.
Evidence and limits
The cited references support anatomical orientation or regional care. The activity and starting dose are clinical adaptations, with no isolated-muscle efficacy established by those references.

Exercise and rehabilitation

Supported internal-rotation loading[1][2]

Consider when. Preserved internal rotation with a tolerable level of effort.

With elbow at the side and forearm supported, press inward gently against the opposite hand; progress to a light band through a small arc.

Dose and review
Starting example: one set of 5–8 comfortable repetitions on alternate days; adjust to irritability and the next-day response.
Progression
Add resistance after movement and next-day comfort remain stable.
Stop or reassess
Reduce the load for a lasting flare; new marked weakness, numbness or sharp injury pain requires reassessment.
Evidence and limits
The cited references support anatomical orientation or regional care. The activity and starting dose are clinical adaptations, with no isolated-muscle efficacy established by those references.

Clinician-delivered care

Clinician-guided rotation and cuff rehabilitation[2]

Consider when. Persistent dressing difficulty or restricted external rotation.

Measure passive range and rotation strength, then select supported mobility and graded cuff work. Respect postoperative restrictions.

Dose and review
Try the change during the provoking task and review its effect on pain and task tolerance before continuing.
Progression
Retest dressing reach, passive external rotation and force; investigate persistent objective weakness.
Stop or reassess
Reduce the load for a lasting flare; new marked weakness, numbness or sharp injury pain requires reassessment.
Evidence and limits
Active rehabilitation is supported for cuff tendinopathy; the examination determines whether a tear or stiff-joint pathway is more appropriate.

Reassessment and follow-up

  • Repeat belly press and passive external rotation.
  • Compare a specific dressing task and night-pain interruption.
  • Record controlled internal-rotation repetitions at the same band resistance and elbow position, including the following-day response before adding load.

Evidence and sources

  1. University of Washington Muscle Atlas: Subscapularis

    2026 · University anatomical reference

    Accessed September 2026; access year. Used for attachments and actions, not treatment efficacy or point-map validation.

  2. Desmeules et al. Rotator Cuff Tendinopathy Diagnosis, Nonsurgical Medical Care, and Rehabilitation

    2025 · Clinical practice guideline

    Adults with cuff tendinopathy, including partial-thickness tears; not full-thickness tears. Recommends active rehabilitation, distinguishes calcific from noncalcific shockwave indications.

  3. Jain et al. The Diagnostic Accuracy of Special Tests for Rotator Cuff Tear: The ROW Cohort Study

    2017 · Prospective diagnostic cohort

    208 participants; strength/lag tests inform tear assessment, not muscle trigger-point diagnosis. Negative subscapularis tests can miss tears.

Associated Trigger Points