Scapular Mobilization & Scapular PNF in Frozen Shoulder - Complete Clinical Guide

PART 1: SCAPULAR MOBILIZATION IN FROZEN SHOULDER

Rationale

Patient Position & Therapist Setup

• Hips and knees slightly flexed for stability
• Affected shoulder uppermost
• Arm positioned at approximately 90° of shoulder flexion (supported if needed, or resting naturally)
• Head supported on a pillow

• One hand on the superior angle / upper border of the scapula (thumb and fingers wrapping over the top)
• Other hand on the inferior angle of the scapula (palm cupping the inferior tip)
• Alternatively: one hand grasps the medial border from behind with fingers spread

Step-by-Step Technique

Step 1 - Pre-mobilization Assessment

• Palpate the scapular borders (medial, superior, inferior angle) to identify areas of restricted gliding or muscle guarding
• Note any muscle spasm in the periscapular muscles (trapezius, serratus anterior, rhomboids)
• Perform a quick baseline ROM assessment (flexion, abduction, external rotation) before beginning

Step 2 - Soft Tissue Warm-Up (2-3 minutes)

• Apply gentle effleurage and petrissage over the trapezius, levator scapulae, and rhomboids before mobilization
• This reduces guarding and increases tissue compliance

Step 3 - Mediolateral Glide (Distraction-Compression)

1. Grasp the medial border of the scapula with your fingers
2. Gently lift and pull the scapula away from the thoracic wall (winging) - this distracts the scapulothoracic joint
3. Hold 2-3 seconds, then ease back
4. Repeat slowly and rhythmically

• Dose: 10 repetitions, 30-second rest, 3 sets

Step 4 - Superoinferior (Cranial-Caudal) Glide

1. Place one hand on the superior angle, other on inferior angle
2. Gently push the scapula downward (caudal) toward the pelvis - firm, controlled pressure
3. Hold at end range 2-3 seconds, release slowly
4. Then push the scapula upward (cranial) toward the ear
5. Perform as a smooth, alternating rhythm

• Dose: 10 repetitions each direction, 30-second rest, 3 sets

Step 5 - Circumduction / Circular Mobilization

1. Cup the inferior angle with one hand and place the other over the superior angle/shoulder
2. Move the scapula through a circular arc - up, out (lateral), down, in (medial) - like tracing a large oval
3. Keep movement smooth, controlled, and pain-free
4. Perform clockwise and counterclockwise

• Dose: 10 repetitions each direction, 30-second rest, 3 sets

Step 6 - Anterior Tipping Mobilization

1. Place fingers under the medial border and inferior angle
2. Gently tip the inferior angle anteriorly toward the ribs while lifting the medial border
3. Hold 5-10 seconds at end range (Grade III-IV)

• Dose: 5-6 repetitions, 30-second rest

Step 7 - Post-mobilization Integration

• Ask the patient to perform active-assisted shoulder elevation immediately after mobilization
• This integrates the new range achieved into functional movement patterns

Dosage Summary for Scapular Mobilization

PART 2: SCAPULAR PNF IN FROZEN SHOULDER

Rationale

• Targets neuromuscular control deficits
• Restores scapulohumeral rhythm through facilitated muscle activation
• Improves glenohumeral ROM by reducing capsular tightness via diagonal loading
• Reduces pain through autogenic and reciprocal inhibition mechanisms

The Two Scapular PNF Diagonal Patterns

Diagonal 1 (D1): Anterior Elevation ↔ Posterior Depression

• Anterior Elevation: Scapula moves up and forward (protracts and elevates)
• Posterior Depression: Scapula moves down and back (retracts and depresses)
• Linked to D1 flexion UE pattern (shoulder flexion-adduction-external rotation)

Diagonal 2 (D2): Posterior Elevation ↔ Anterior Depression

• Posterior Elevation: Scapula moves up and back (elevates and retracts)
• Anterior Depression: Scapula moves down and forward (depresses and protracts)
• Linked to D2 flexion UE pattern (shoulder flexion-abduction-external rotation)

Patient & Therapist Position

• Same setup as scapular mobilization
• Affected shoulder uppermost, arm relaxed

• One hand on the upper edge / superior angle of the scapula (to guide elevation component)
• Other hand on the inferior angle / lower corner of the scapula (to guide depression component)
• Fingers provide the resistance or facilitation cues along the line of movement

PNF Facilitation Techniques Used for Scapula

1. Rhythmic Initiation (RI)

1. Therapist passively moves the scapula through the full diagonal (slow, rhythmic) - no patient effort
2. Give verbal cues: "Let me move your shoulder blade - relax completely"
3. Progress to active-assistive movement: "Now help me a little"
4. Progress to active movement: "Now you do the movement"
5. Finally add gentle resistance: "Now push against my hands"
6. Progression should happen over multiple reps or sessions depending on pain

2. Repeated Contractions (RC)

1. Move the scapula passively to the elongated (starting) position of the pattern
2. Apply a quick stretch at the elongated position (brief overpressure in the direction opposite to desired movement) to facilitate the agonist
3. Patient then performs an isotonic contraction through the range
4. When the contraction weakens mid-range, apply another quick stretch to reinforce
5. Repeat the stretch-contraction cue through the full arc
6. Verbal cue: "Pull! Pull! Pull!" (rhythmic)

3. Hold-Relax (HR) - used when ROM is primarily limited

1. Move scapula to the point of limitation / resistance barrier
2. Apply resistance - patient holds (isometric contraction) against your resistance for 5 seconds
3. Patient completely relaxes for 2 seconds
4. Therapist moves scapula into the new range gained
5. Repeat from new position

4. Contract-Relax (CR)

1. Move scapula to restriction
2. Patient performs isotonic rotatory contraction (actually moves against your resistance) through available range
3. Complete relaxation phase (2 seconds)
4. Therapist moves into new range passively

Step-by-Step Protocol: Scapular PNF Session

Step 1 - Positioning & Explanation

• Position patient in side-lying as described
• Explain the goal and what they will feel
• Demonstrate the direction of movement passively first

Step 2 - Elongation to Starting Position

• Therapist manually takes the scapula to the fully elongated position (start of diagonal)
• For Anterior Elevation pattern - elongated position = posterior depression (scapula pulled back and down)
• For Posterior Elevation pattern - elongated position = anterior depression (scapula forward and down)

Step 3 - Apply Quick Stretch (for Repeated Contractions technique)

• At the elongated position, apply a brief, gentle overpressure to stretch the agonist muscles
• This activates the stretch reflex and facilitates the contraction

Step 4 - Cue and Guide the Movement

• Give clear verbal and tactile cues simultaneously
• Guide the scapula through the full diagonal arc
• For Anterior Elevation: up and forward motion
• For Posterior Depression: down and back motion
• Resistance is graded (never painful) - use "just enough to feel but not hurt"

Step 5 - Resistance Grading

• Grade I-II resistance: pain-dominant phase (freezing/painful stage)
• Grade III resistance: frozen stage (some stiffness, less acute pain)
• Grade IV resistance: thawing stage (increase load progressively)

Step 6 - Pattern Reversal (Dynamic Reversals)

• After completing Anterior Elevation, immediately reverse without rest into Posterior Depression
• This builds coordination between agonist and antagonist scapular muscle groups
• Improves timing of serratus anterior, trapezius, and rhomboid activation

Step 7 - Rest and Reassess

• After each set, rest 20-30 seconds
• Check for any pain exacerbation
• Re-assess shoulder ROM (flexion, abduction) to gauge immediate effect

Full Dose Protocol (Evidence-Based)

• Frequency: 4 sessions/week
• Duration: 6 weeks (total 24 sessions)
• Complemented by: D2F UE PNF pattern (flexion-abduction-external rotation) using Hold-Relax: 10 sets x 5 reps, 5-sec hold, 2-sec rest (15 minutes)

• 20 repetitions per pattern per session
• 20-second rest between repetitions
• Both diagonals performed in each session
• 1 hour session total including adjunct modalities

Phase-Specific Approach

Key Clinical Tips

1. Never force the scapula - all mobilization and PNF should be within comfortable range; pain during technique is a contraindication to increasing force
2. Verbal cues matter - use rhythm, encourage relaxation during passive phases
3. Scapular PNF before glenohumeral mobilization - mobilizing the scapula first reduces compensatory patterns and allows the glenohumeral joint to respond better to subsequent mobilization
4. Combine with heat - applying a hot pack for 15-20 minutes before scapular work increases tissue extensibility
5. Assess scapulohumeral rhythm after each session - the ratio should trend toward normal (2:1 glenohumeral:scapulothoracic above 30° abduction)
6. Home exercise integration - teach patients active scapular elevation/depression and protraction/retraction as home exercises to reinforce gains

• Balci et al. (2016), J Phys Ther Sci - Scapular PNF RCT in adhesive capsulitis
• Kaymak et al. (2019), Which method for frozen shoulder mobilization - PMC
• Springer RCT (2025), PNF pattern UE and scapula in adhesive capsulitis - Trials journal
• International Journal of Sports Physical Therapy - PNF for UE and Scapula review

Scapulohumeral Rhythm - Assessment and Restoration

SECTION 1: UNDERSTANDING SCAPULOHUMERAL RHYTHM (SHR)

Normal SHR Mechanics

• Classic ratio: 2:1 (GH : ST) - for every 2° the humerus moves at the GH joint, the scapula rotates 1° on the thorax
• This ratio is not fixed - it varies between 1:1 and 1:4 depending on the phase of elevation
• Full arm elevation (180°) = approx. 120° at GH + 60° at ST (upward scapular rotation)

• Upward rotation (primary)
• Posterior tilting
• External rotation (at end-range)

Why SHR Breaks Down in Frozen Shoulder

• Scapula rotates earlier and excessively - the ST joint does the work the GH joint cannot
• This reverses or distorts the normal 2:1 ratio
• The scapula may elevate (shrug sign) prematurely as upper trapezius overactivates
• Lower trapezius and serratus anterior become inhibited from disuse
• The force couple controlling scapular upward rotation is disrupted

SECTION 2: ASSESSMENT OF SCAPULOHUMERAL RHYTHM

Step 1 - Visual Observation (Scapular Dyskinesis Test - SDT)

1. Patient stands with arms relaxed at sides, facing away from examiner
2. Ask them to elevate both arms simultaneously:
   • Through forward flexion (to 180°, then back down)
   • Through scaption (in scapular plane - 30° anterior to coronal)
   • Through abduction (if tolerable)
3. Observe both the ascending and descending arcs - dyskinesis is often more visible during lowering
4. Repeat 3-5 times with a small weight (1-1.5 kg) to unmask subtle deficits

• Normal (N): Smooth, symmetric scapular motion
• Abnormal (A): Visible winging or dysrhythmia

• Type I: Inferior angle prominence - scapula anteriorly tilted (pectoralis minor tightness + serratus anterior / lower trapezius weakness)
• Type II: Entire medial border prominent - scapula internally rotated
• Type III: Superior medial border prominence - scapula downwardly rotated (levator/rhomboid overactivation, upper trapezius/serratus dysfunction)

Step 2 - Lateral Scapular Slide Test (LSST)

1. Identify and mark the inferior angle of the scapula bilaterally with a skin marker
2. Identify and mark the nearest spinous process at the same horizontal level on each side
3. Measure the horizontal distance (cm) from spinous process to inferior angle on both sides
4. Repeat in 3 positions:
   • Position 1: Arms relaxed at sides (0° elevation)
   • Position 2: Hands on hips / iliac crests (approx. 60° abduction with IR)
   • Position 3: Arms abducted to 90° with IR (most challenging position)
5. Record bilateral measurements in each position

• Side-to-side difference > 1.5 cm in any position = significant scapular asymmetry (dyskinesis positive)
• Asymmetry increasing from Position 1 to 3 = dynamic neuromuscular deficit (worsens with load)
• Note: Sensitivity 28-50%, Specificity 48-58% - use alongside other tests; not diagnostic alone

Step 3 - Scapular Assistance Test (SAT)

1. Patient standing, affected arm at side
2. Examiner stands behind patient
3. Place one hand on the clavicle/scapular spine (stabilizes), other hand grasps the inferior angle of the scapula
4. As the patient elevates the arm, the examiner manually assists scapular upward rotation and posterior tilting - mimicking what serratus anterior and lower trapezius should do
5. Ask: "Is your pain less or the same?"

• Interpretation: Serratus anterior / lower trapezius weakness or inhibition is contributing to symptoms
• Clinical action: Target these muscles in rehabilitation

Step 4 - Scapular Retraction Test (SRT)

1. Test baseline shoulder flexion strength via standard MMT (rate/5)
2. Examiner manually places and holds the scapula in a retracted position (scapula pulled back toward spine)
3. Re-test shoulder flexion strength in the same position
4. Alternatively: assess for relief of internal impingement symptoms in retracted position

• Interpretation: Scapular protraction and internal rotation are contributing to symptoms; stabilizer weakness present

Step 5 - Inclinometer Method (Quantitative SHR)

1. Attach Inclinometer 1 to the humerus (just below deltoid insertion) - set to 0° in resting position
2. Attach Inclinometer 2 over the scapular spine / body - set to 0° at rest
3. Patient elevates arm through scaption to maximum elevation
4. Record humerus elevation angle and scapular upward rotation angle at:
   • 30°, 60°, 90°, 120°, and maximum elevation
5. Calculate ratio: GH motion : ST motion at each point

• At 90° total elevation: ~60° GH + ~30° ST (2:1)
• At 150° total elevation: ~100° GH + ~50° ST

Step 6 - Low Row Test

1. Patient standing, involved arm at side, palm facing posteriorly
2. Instruct: "Extend your arm back, retract and depress your shoulder blade"
3. Examiner provides resistance in the direction opposing shoulder extension
4. Observe lower trapezius contraction visually (dimpling below scapular spine)

Summary of Assessment Battery

SECTION 3: RESTORATION OF SCAPULOHUMERAL RHYTHM

Foundational Principle

1. Upper trapezius + lower trapezius + serratus anterior = upward rotation force couple
2. Rhomboids + pectoralis minor = opposing/antagonist pair (must not be dominant)

• Overactive/tight: Upper trapezius, pectoralis minor, levator scapulae
• Inhibited/weak: Lower trapezius, serratus anterior, middle trapezius

Phase 1: Inhibition and Flexibility (Weeks 1-2)

1A. Pectoralis Minor Stretch

1. Patient standing in doorway or corner
2. Elbow at 90°, arm on door frame at shoulder height
3. Step forward gently, feeling stretch across anterior chest/coracoid
4. Hold 30 seconds x 3 repetitions, 2x/day

1B. Posterior Capsule Stretch (Sleeper Stretch)

1. Side-lying on affected side
2. Affected arm forward at 90° flexion
3. Unaffected hand gently pushes forearm down toward table (IR)
4. Hold 30 seconds x 3 repetitions

1C. Levator Scapulae Stretch

1. Sitting, stabilize affected shoulder by gripping chair seat
2. Flex neck forward + laterally flex away from affected side + rotate chin toward opposite axilla
3. Hold 30 seconds x 3 repetitions

1D. Upper Trapezius Release (Manual / Self)

• Gentle STM / trigger point release at upper trapezius before strengthening
• Or: Lateral neck stretch (ear to shoulder, stabilizing affected arm)

Phase 2: Motor Control and Neuromuscular Re-education (Weeks 2-4)

2A. Scapular Setting / Conscious Correction

1. Patient in sitting or standing before a mirror (visual feedback)
2. Cue: "Gently pull your shoulder blade down and back - do not squeeze hard"
3. Hold this position for 5 seconds, relax completely
4. Progression: Maintain this set position while performing gentle arm movements

• Dose: 10 reps x 3 sets, 2-3x/day

2B. Low Row (Closed Chain - Early)

1. Patient at a cable machine / theraband anchored low
2. Elbow bent 90°, start with arm forward
3. Drive movement with the scapula - retract and depress first, then pull elbow back
4. Short lever arm (elbow close to body) reduces upper trapezius demand
5. Return slowly under control

• Dose: 3 x 15 reps, light resistance

2C. Supine Serratus Punch

1. Patient supine, arm at 90° shoulder flexion (pointing at ceiling)
2. Maintain elbow in extension
3. "Punch the ceiling" - protract the scapula (push shoulder blade away from table)
4. Hold 2 seconds at full protraction, return slowly
5. Add light weight (0.5-1 kg) as tolerance improves

• Dose: 3 x 20 reps, daily

2D. Wall Slide

1. Patient standing, forearms against wall, elbows at shoulder height
2. Keeping forearms on wall, slowly slide arms upward (shoulder elevation)
3. Focus: Do NOT shrug - maintain scapular control throughout
4. Slide up as high as comfortable, return slowly

• Dose: 3 x 10-15 reps

2E. Prone T/Y/W Exercises

• Prone T (horizontal abduction): Arm at 90° to body, thumbs up, squeeze shoulder blades. 3 x 15 reps
• Prone Y (elevation at 120°): Arms at 120° (Y shape), thumbs up, lift off table. 3 x 12 reps
• Prone W: Elbows bent 90°, externally rotate and squeeze. Activates all three trapezius portions. 3 x 15 reps
• Begin without weight; progress to 1-2 kg as technique is maintained

Phase 3: Strengthening and Coordination (Weeks 4-8)

3A. Side-lying External Rotation

1. Side-lying, affected arm on top, elbow at 90°, towel roll under arm
2. Externally rotate (lift forearm toward ceiling)
3. Hold 2 seconds at top

• Dose: 3 x 15 reps with light theraband or 0.5-1 kg dumbbell

3B. Elevation with External Rotation (Standing / Scaption with ER)

1. Standing, arm elevated in scapular plane (30° anterior to coronal)
2. Thumb pointing up (external rotation position)
3. Raise arm to shoulder height while maintaining scapular set (no shrug)
4. Hold 2 seconds, lower under control

• Dose: 3 x 12-15 reps, theraband or 1-2 kg dumbbell

3C. Horizontal Abduction with External Rotation

1. Prone, arms elevated to 90° (T position)
2. Externally rotate (thumbs up)
3. Lift arms off table, hold 2 seconds

• Dose: 3 x 12 reps

3D. Diagonal PNF Patterns (D2F)

• As covered in the previous session - integrate PNF diagonal UE patterns here to build neuromuscular coordination
• D2 Flexion: shoulder flexion-abduction-external rotation
• Builds on scapular PNF learned in Phase 2

3E. Foam Roller Wall Slide

1. Standing, forearm holding foam roller against wall at shoulder height
2. Roll upward along wall while controlling scapular motion
3. Prevents shoulder hike; forces proper serratus activation

• Dose: 3 x 10 reps

Phase 4: Functional Integration (Weeks 6-12)

4A. Kinetic Chain Integration

• Begin upper extremity movements driven from the pelvis and trunk
• Example: Diagonal wood chop patterns, cable press, functional reaching activities
• All movements should begin with conscious scapular set

4B. Proprioceptive Training

• Ball rolling on wall in circular pattern (closed chain proprioception)
• Single-arm balance on unstable surface (foam pad, wobble board) in weight-bearing position
• Rhythmic stabilization with manual perturbations from therapist

4C. Overhead Progression

• Only progress to overhead activities when:
  • GH:ST ratio approaches 2:1 on visual/inclinometer re-assessment
  • SAT becomes negative (symptoms do not worsen with elevation)
  • Patient can elevate to 150°+ with smooth scapular rhythm
• Begin with bilateral overhead press, progressing to unilateral

Adjuncts to Restoration

Re-Assessment Milestones

• Rheumatology 2-Volume Set (Elsevier 2022) - Scapulothoracic Joint section, p. 700
• Managing Scapular Dyskinesis - BINASSS/Kibler
• Evaluation and Management of Scapular Dyskinesis in Overhead Athletes - PMC
• Rehabilitation of Scapular Dyskinesis - Musculoskeletal Key
• Scapular Assistance Test - Physiopedia
• LSST and SHR assessment - Hand Therapy Academy

The Low Row Exercise - Complete Clinical Guide

What It Is and Why It Works

• Using a short lever arm (elbow flexed close to body) - mechanically reduces the demand on upper trapezius
• Using the pelvis and trunk as the driver - activates the kinetic chain from proximal to distal, which is the normal sequencing of shoulder function
• Placing the scapula in retraction at the start - this causes serratus anterior to activate first and early in the movement

Muscles Targeted

ISOMETRIC LOW ROW (Version 1 - Earliest, Safest)

Equipment

• Treatment table, plinth, wall-mounted bar, or any fixed immovable surface at approximately waist height
• No resistance band or weight needed initially

Patient Position

1. Patient stands facing the treatment table/surface
2. Feet shoulder-width apart, slight knee bend for stability
3. Trunk in neutral upright position (do not flex forward)
4. Affected arm at side, elbow bent to approximately 90°
5. Place the palm on the anterior edge of the table/surface with the palm facing posteriorly (thumb pointing backward)

Therapist Position

• Stand beside or behind the patient to observe scapular motion
• Palpate the lower trapezius (below the scapular spine, medial border) to confirm activation

Step-by-Step Execution

• Before any pushing, cue the patient: "Gently draw your shoulder blade down and back - away from your ear"
• This pre-positions the scapula in retraction/depression
• Do NOT allow a full shrug at this point

• Cue: "Brace your trunk slightly, push your feet gently into the ground"
• This activates the kinetic chain from below and reduces isolated shoulder muscle dependence

• Patient extends the trunk slightly (small controlled trunk extension)
• Simultaneously pushes the hand into the surface in the direction of shoulder extension (pushing backward/posteriorly)
• At the same time, retract and depress the scapula - shoulder blade moves down and toward the spine
• The glenohumeral joint is essentially static - no actual shoulder movement occurs
• Cue: "Push your hand into the table, pull your shoulder blade down and in"

• Hold for 5 seconds at maximum comfortable effort
• Patient breathes normally - do not hold breath
• Therapist confirms: inferior angle of scapula moves down and toward spine; no shoulder elevation/shrugging

• Slowly release the contraction
• Scapula returns to neutral
• Rest 5-10 seconds
• Repeat

Common Errors and Corrections

Dose - Isometric Phase

ISOTONIC LOW ROW (Version 2 - Progression)

Equipment

• Theraband / resistance band anchored at low height (at or below hip level)
• Cable machine with pulley set low
• The anchor point being LOW is critical - it ensures the pull direction activates LT/SA, not upper trapezius

Patient Position

• Standing facing the anchor point of the theraband
• Arm starts forward at approximately 45° shoulder flexion, elbow slightly flexed
• Neutral wrist, palm facing down or inward

Step-by-Step Execution

• Grasp theraband with affected hand
• Slight lean forward from hips (not spine) - trunk in neutral
• Arm extended forward at 45° - this is the elongated/start position

• Cue: "Straighten up through your hips, extend your trunk slightly"
• Begin movement at the pelvis and trunk - NOT at the arm
• This proximal-to-distal sequencing is the key to kinetic chain activation

• As the trunk extends, the scapula should retract and depress first, followed by elbow pull
• Cue: "Shoulder blade first - pull it down and back, then let your elbow follow"
• Elbow bends and draws backward, finishing close to the side of the body

• Elbow at approximately 90° of flexion, close to the trunk
• Scapula fully retracted and depressed
• Shoulder should NOT be elevated
• Hold end position 2 seconds

• Slowly return the arm to start position with control
• Allow scapula to protract slowly and in a controlled manner
• Do NOT let band snap arm forward
• This eccentric phase is equally important for lower trapezius (it acts as a stabilizer on lowering)

Dose - Isotonic Phase

KINETIC CHAIN LOW ROW (Version 3 - Advanced)

The Lawnmower Progression

• Start with trunk flexed and rotated toward the opposite leg (as if reaching down to pick something off the floor)
• Ipsilateral arm hangs down diagonally
• Drive movement by extending hips and trunk, rotating trunk back to neutral
• The arm follows naturally as the scapula retracts through the kinetic chain
• No isolated arm pull - the scapula moves because the trunk and pelvis move it

EMG Evidence Summary

Rehabilitation Sequencing

EARLIEST                                                    LATEST
    |                                                          |
    v                                                          v
Low Row          Inferior        Lawnmower      Robbery    Open Chain
(Isometric)  ->  Glide       ->  (Dynamic)  ->  (Dynamic) -> Strengthening
                 (Isometric)

SA fires first   SA fires early  UT fires first  UT fires first  Higher load
UT minimal       UT minimal      UT high         UT high         functional

Quick Reference Card

• Stand facing fixed surface
• Palm on surface, palm facing back
• Elbow at 90°, close to body
• Trunk extends slightly
• Push hand into surface + retract and depress scapula
• Hold 5 sec x 10 reps x 3 sets
• No shoulder elevation allowed

• Kibler WB et al. (2008), EMG analysis of specific exercises for scapular control in early shoulder rehabilitation - AJSM
• Kinetic Chain Rehabilitation: A Theoretical Framework - PMC
• NASM - Enhancing Scapular Stabilization