Teres Major & Minor Exercises: Complete PT Guide to Shoulder Strengthening & Injury Prevention

Introduction: Why Your Shoulder Stability Depends on These Muscles

Shoulder pain is the third most common musculoskeletal complaint in primary care, affecting approximately 1 in 3 people annually. Yet most people focus exclusively on their rotator cuff—the famous four muscles—while ignoring two critical muscles beneath the surface: the teres major and teres minor.

Here’s the truth: weak or imbalanced teres muscles are among the top hidden causes of shoulder impingement, rotator cuff strain, and chronic shoulder pain. Physical therapists know that strengthening these muscles is often the missing piece between “doing rotator cuff exercises” and actually feeling relief.

The good news? These muscles respond rapidly to targeted exercise. Most patients notice significant improvements in shoulder stability, pain reduction, and strength within 3-4 weeks of consistent training. In this guide, you’ll learn exactly how to assess, strengthen, and maintain these critical stabilizers—whether you’re recovering from injury, preventing future problems, or optimizing athletic performance.

What Are the Teres Major & Minor? Anatomy You Need to Understand

Location & Basic Function

The teres major and teres minor are two distinct muscles located on the posterior (back) side of your shoulder, beneath the more famous latissimus dorsi muscle. While they work near the rotator cuff, they serve different—but equally important—functions.

Teres Minor:

• Located on the back/posterior shoulder
• Part of the rotator cuff (yes, it’s actually the 4th rotator cuff muscle, not a separate group)
• Primary function: external rotation of the arm (rotating your arm outward)
• Secondary function: assists with arm adduction (pulling arm down)
• Size: Smaller muscle (hence “minor”)

Teres Major:

• Located directly below and slightly overlapping the teres minor
• NOT part of the rotator cuff (commonly misunderstood)
• Primary function: internal rotation, adduction, and extension of the arm
• Works closely with the latissimus dorsi
• Size: Larger and more powerful than teres minor (hence “major”)

Why They Matter More Than Most People Realize

These muscles are critical for:

• Shoulder stability: Especially in overhead movements (throwing, swimming, volleyball)
• Rotator cuff support: The teres minor prevents humeral head migration during arm movement
• Scapular control: Proper firing patterns of these muscles stabilize the entire shoulder complex
• Posterior chain strength: They connect the shoulder to the torso, influencing posture
• Pain prevention: Weakness here commonly leads to impingement and rotator cuff strain

Common misconception: People think “rotator cuff” only includes supraspinatus, infraspinatus, and subscapularis. The teres minor is your 4th rotator cuff muscle and is often neglected in standard rehabilitation programs.

Symptoms of Teres Major & Minor Dysfunction

What Weakness or Tightness Feels Like

Many people experience teres muscle dysfunction without realizing it. Here are the telltale signs:

Weakness Symptoms:

• Difficulty with external rotation (trouble rotating arm outward against resistance)
• Shoulder instability or feeling like arm “slips” in socket
• Pain with overhead reaching (especially combined with other movements)
• Loss of strength in throwing or reaching activities
• Shoulder fatigue disproportionate to activity level
• Difficulty maintaining posture (shoulders rolling forward)
• Persistent shoulder impingement symptoms not improving with standard rotator cuff exercises

Tightness Symptoms:

• Dull ache on posterior shoulder (back of shoulder)
• Restricted internal rotation (difficulty reaching behind your back)
• Feeling of “stiffness” in back of shoulder, especially in morning
• Postural imbalance (rounded shoulders, one shoulder higher than other)
• Discomfort with exercises that require arm positioning across body
• Referred pain down inside of arm

When These Symptoms Develop

Common situations causing teres muscle problems:

• Overhead athletes: Swimmers, baseball pitchers, volleyball players, CrossFit athletes
• Desk workers: Prolonged poor posture activates these muscles in shortened position
• After rotator cuff injury: If teres muscles aren’t included in rehabilitation, re-injury is common
• Post-injury immobilization: After shoulder surgery or fracture, these muscles atrophy quickly
• Repetitive strain: Occupations involving reaching, lifting, or sustained arm positioning
• Age-related degeneration: Natural loss of muscle mass affects shoulder stability proportionally

Causes & Risk Factors: Why Dysfunction Develops

Primary Causes

Postural Dysfunction (Most Common) Rounded shoulder posture—from desk work, phone use, or habitual positioning—places the teres muscles in a chronically shortened, weakened position. Over time, this inhibits proper muscle activation.

Overuse in Overhead Activities The teres minor bears significant load during throwing and overhead sports. Without adequate rest and strengthening, it fatigues and becomes vulnerable to strain or microtrauma.

Rotator Cuff Injury Without Comprehensive Rehab Patients often rehabilitate the supraspinatus and infraspinatus but neglect teres muscles. This creates imbalance and predisposes to re-injury.

Immobilization or Reduced Activity After injury or surgery, muscles atrophy rapidly. The teres muscles are particularly susceptible because they’re smaller and atrophy within 1-2 weeks of disuse.

Age-Related Muscle Loss (Sarcopenia) Naturally occurring muscle loss with aging affects stabilizer muscles proportionally more than large muscle groups. Without specific strengthening, older adults lose shoulder stability.

Muscular Imbalance Overdeveloped chest and anterior shoulder muscles (common in weightlifters and swimmers) can inhibit teres muscle function and create postural imbalance.

Risk Factors That Increase Vulnerability

• Sedentary lifestyle (lack of strengthening stimulus)
• Poor posture maintained for 6+ hours daily
• Previous shoulder injury or surgery
• Overhead sports participation without proper conditioning
• Repetitive work activities
• Age over 50 (natural decline in muscle mass)
• Lack of posterior chain training
• Muscle tightness in chest or anterior shoulder

Professional Assessment: What a PT Looks For

Initial Assessment

When you see a physical therapist for shoulder issues, they’ll specifically assess your teres muscles through several tests:

Manual Muscle Testing

• External rotation resistance test (teres minor primary test)
• Internal rotation strength testing
• Adduction strength against resistance
• Comparison between involved and non-involved shoulders (should be symmetrical)

Positional Testing

• Scapular position assessment (looking for winging or dyskinesis)
• Spinal posture evaluation
• Shoulder positioning during rest and movement
• Active range of motion in all planes

Functional Movement Assessment

• Overhead reaching patterns
• Loaded reaching (with weights)
• Pushing and pulling movements
• Sport-specific movement patterns (for athletes)

Palpation

• Direct palpation of teres minor (posterior shoulder, below scapular spine)
• Palpation of teres major (lower posterior shoulder)
• Assessment of muscle tension, trigger points, or adhesions

Imaging Decisions

• Most teres dysfunction is diagnosed clinically (physical examination)
• Ultrasound may be ordered if rotator cuff tear is suspected
• MRI rarely necessary unless complete muscle tears present
• X-rays if bony injury suspected
• EMG testing unusual unless neural involvement suspected

Physical Therapy Treatment: Complete Exercise & Management Protocol

Foundation: Understanding Activation & Progression

Before performing teres exercises, understand this critical principle: these muscles are smaller stabilizers, not prime movers. The emphasis should be on:

• Proper activation patterns (using correct muscles)
• Consistent, progressive loading (not heavy weight)
• High-quality movement (not quantity of reps)
• Gradual progression (over weeks and months)

The goal is controlled strength and endurance, not maximum load.

Specific Teres Major & Minor Exercises

LEVEL 1: ACTIVATION & BASIC STRENGTHENING (Weeks 1-2)

These exercises restore basic muscle activation after injury or prolonged disuse.

Exercise 1: Prone Shoulder External Rotation (Sidelying)

Purpose: Isolate teres minor activation without compensatory patterns

Starting Position:

• Lie on your side, injured arm facing down (left side if right shoulder affected)
• Shoulder at 90° abduction (arm perpendicular to body)
• Elbow bent 90°
• Towel roll under armpit (maintains proper scapular position)
• Forearm pointing forward (neutral)

Execution:

1. Keeping elbow stationary, rotate forearm upward
2. Movement should come from shoulder joint, not elbow movement
3. Rotate until forearm approaches vertical (about 45-60°)
4. Hold top position 2 seconds
5. Slowly return to starting position
6. Focus on feeling posterior shoulder muscle working

Recommended Dosage:

• 2-3 sets of 10-12 repetitions
• Perform 5-6 days per week
• No added weight initially

Modifications:

• Easier: Reduce range of motion (only 30° rotation)
• Harder: Hold 3-5 second pause at top, or add 1-2 lb weight

What You Should Feel:

• Deep burning in posterior shoulder
• No shoulder joint pain (only muscle fatigue)
• Scapula should remain stable (no shrugging)

Common Mistakes:

• Using shoulder elevation to assist movement (shrugging)
• Moving elbow away from body
• Too much momentum/speed
• Compensating with trunk rotation

Exercise 2: Prone Y-T-I Movements

Purpose: Activate posterior shoulder muscles (teres plus infraspinatus and rhomboids) in functional patterns

Starting Position:

• Lie prone (face down) on table, head in neutral position, arms hanging off edge
• Legs extended, core engaged (tighten abdominal muscles)
• Thumbs pointing forward

Execution:

Y Position:

1. Raise both arms overhead at 45° angle (forming “Y” shape)
2. Thumbs reaching toward ceiling
3. Raise until level with ears (don’t go past head height)
4. Hold 2 seconds
5. Lower with control
6. Perform 10 repetitions

T Position:

1. Raise both arms to sides (90° abduction, forming “T” shape)
2. Thumbs pointing up (external rotation)
3. Raise to shoulder height
4. Hold 2 seconds
5. Lower with control
6. Perform 10 repetitions

I Position:

1. Raise both arms directly overhead (forming “I” shape)
2. Thumbs pointing up
3. Raise to shoulder height
4. Hold 2 seconds
5. Lower with control
6. Perform 10 repetitions

Recommended Dosage:

• 2-3 sets of 10 reps each position
• Perform 4-5 days per week
• No added weight initially

Modifications:

• Easier: Only raise arms 6 inches off table
• Harder: Add 1-2 lb dumbbells, or increase hold time to 5 seconds

What You Should Feel:

• Entire posterior shoulder “waking up”
• Upper back muscles (rhomboids) engaging
• No shoulder joint pain

Common Mistakes:

• Raising arms too high (past shoulder height)
• Arching lower back excessively
• Moving with momentum instead of control
• Shrugging shoulders toward ears

Exercise 3: Sleeper Stretch (Mobility Work)

Purpose: Maintain internal rotation mobility (tight pectoralis minor and shoulder capsule restrict teres function)

Starting Position:

• Lie on right side (side opposite to affected shoulder)
• Right shoulder at 90° abduction
• Right elbow bent 90°
• Left shoulder at 90° abduction
• Left elbow bent 90°, forearm pointing toward ceiling

Execution:

1. Using right hand, gently press left forearm toward table/floor
2. Movement is slow, controlled stretch
3. Feel stretch deep in back of left shoulder
4. Hold 30 seconds
5. Release slowly
6. Repeat 3 times each side
7. Never force or bounce

Recommended Dosage:

• 1-2 times daily
• Hold 30 seconds, repeat 3 times each shoulder
• Especially beneficial before bed

Modifications:

• More stretch: Increase pressure gradually (don’t force)
• Less stretch: Apply lighter pressure

What You Should Feel:

• Deep stretch sensation in posterior shoulder
• No sharp pain (should be mild to moderate stretch sensation)

Common Mistakes:

• Using excessive force
• Bouncing or jerking movements
• Not breathing (hold breath)
• Trying to force too much range too quickly

LEVEL 2: PROGRESSIVE STRENGTHENING (Weeks 3-4)

After 2 weeks of activation work, progress to exercises that build strength and endurance.

Exercise 4: Standing External Rotation with Resistance Band

Purpose: Build external rotation strength in functional standing position

Starting Position:

• Stand with feet hip-width apart
• Affected arm at side, elbow bent 90°
• Hold resistance band (light to medium resistance) in hand
• Band anchored to sturdy object at elbow height (or have partner hold other end)
• Core engaged, neutral spine

Execution:

1. Keeping elbow against ribcage, externally rotate shoulder
2. Rotate arm outward, bringing hand away from body
3. Movement comes from shoulder joint (elbow stays at side)
4. Rotate until hand reaches 45-60° from starting position
5. Hold 2 seconds
6. Return slowly to starting position
7. Complete all reps on one side before switching

Recommended Dosage:

• 3 sets of 12-15 repetitions
• Perform 4-5 days per week
• Band should feel like 5-6 out of 10 resistance

Modifications:

• Lighter resistance: Use yellow or red band, or increase distance from anchor point
• Heavier resistance: Use blue or green band, or decrease distance from anchor

What You Should Feel:

• Posterior shoulder muscle fatigue
• Controlled resistance throughout movement
• No shoulder joint pain

Common Mistakes:

• Moving elbow away from body
• Too much rotation (going past 60°)
• Momentum-driven movement
• Posture collapse (trunk rotation compensating)

Exercise 5: Prone Horizontal Abduction with External Rotation

Purpose: Strengthen teres minor and infraspinatus in functional pattern; improve scapular control

Starting Position:

• Lie prone on table, forehead on small towel
• Affected arm hangs off edge, elbow extended
• Other arm along body for stability
• Core engaged

Execution:

1. Abduct arm (raise out to side) until parallel with floor
2. Simultaneously externally rotate shoulder (thumb reaching toward ceiling)
3. At top position, arm forms “T” shape with thumb pointing up
4. Hold 2 seconds, focusing on posterior shoulder muscle
5. Lower arm with control
6. Complete all reps before switching sides

Recommended Dosage:

• 2-3 sets of 10-12 repetitions
• Perform 4-5 days per week
• No weight initially, progress to 2-3 lbs

Modifications:

• Easier: Reduce range of motion (only raise arm 45°)
• Harder: Add 3-5 lb dumbbell, or increase hold time to 3-5 seconds

What You Should Feel:

• Deep posterior shoulder fatigue
• Scapular muscles engaging (between shoulder blades)
• No joint pain

Common Mistakes:

• Incomplete external rotation (internal rotation with arm raising)
• Using trunk rotation to assist
• Raising arm higher than shoulder height
• Too much momentum

Exercise 6: Cross-Body Shoulder Stretch (Posterior Shoulder)

Purpose: Improve cross-body adduction mobility; reduce posterior shoulder tightness

Starting Position:

• Stand or sit with good posture
• Right arm across body at shoulder height
• Left hand grasping right elbow or upper arm

Execution:

1. Using left hand, gently pull right arm across body toward left shoulder
2. Feel stretch in posterior right shoulder
3. Hold 30 seconds
4. Release and repeat 3 times
5. Switch sides

Recommended Dosage:

• 1-2 times daily
• 30-second holds, 3 repetitions each side
• Especially after strengthening exercises

Modifications:

• More stretch: Apply additional gentle pressure
• Less stretch: Reduce pressure, keep arm higher

What You Should Feel:

• Gentle stretch in back of shoulder
• No sharp pain

Common Mistakes:

• Using too much force
• Bouncing movements
• Not holding long enough (30 seconds minimum)

LEVEL 3: ADVANCED STRENGTHENING & SPORT-SPECIFIC (Weeks 5-8)

Once foundation strength established, progress to advanced exercises and sport-specific training.

Exercise 7: Resistance Band Pull-Apart (Posterior Shoulder Emphasis)

Purpose: Strengthen teres major and minor in horizontal plane; improve scapular retraction

Starting Position:

• Stand with feet hip-width apart
• Arms at shoulder height, elbows slightly bent
• Hold resistance band with both hands, shoulder-width apart
• Band should have light to moderate tension at starting position
• Core engaged, neutral spine

Execution:

1. Pull band apart by separating hands horizontally
2. Elbows remain at shoulder height (don’t drop them)
3. Pull until band reaches chest, with elbows behind shoulders
4. Squeeze shoulder blades together at end range
5. Hold 2 seconds
6. Return slowly to starting position
7. Maintain tension on band throughout movement

Recommended Dosage:

• 3 sets of 12-15 repetitions
• Perform 4-5 days per week
• Progress band resistance every 2-3 weeks

Modifications:

• Lighter resistance: Use lighter band
• Harder: Use heavier band, or decrease distance between hands at start

What You Should Feel:

• Posterior shoulder and upper back (scapular) muscles working
• Contraction between shoulder blades
• No shoulder joint pain

Common Mistakes:

• Dropping elbows below shoulder height (defeats purpose)
• Using arms (not scapular muscles) to pull
• Incomplete range of motion
• Jerky movements

Exercise 8: Prone “W” Raise to “I” Position

Purpose: Progress from Level 1 Y-T-I work; build muscular endurance in posterior shoulder

Starting Position:

• Lie prone on table, arms hanging off edge
• Head in neutral position (don’t arch neck)
• Legs extended, core engaged
• Thumbs pointing forward

Execution:

1. Raise both arms to form “W” shape (elbows bent approximately 90°, upper arms parallel to floor)
2. Hold top position 1 second
3. Extend elbows, straightening arms into “I” position overhead
4. Hold “I” position 2 seconds
5. Lower back to “W” position
6. Return arms down
7. Repeat entire sequence

Recommended Dosage:

• 2-3 sets of 8-10 repetitions
• Perform 3-4 days per week
• Excellent endurance builder

Modifications:

• Easier: Perform Y-T-I holds separately (don’t combine)
• Harder: Add 2-3 lb dumbbells, or increase hold times to 3 seconds each position

What You Should Feel:

• Progressive posterior shoulder fatigue through movement
• Upper back muscles fatiguing
• No shoulder joint pain

Common Mistakes:

• Arching lower back excessively (engage core)
• Shrugging shoulders toward ears
• Moving with momentum
• Not fully extending elbows in “I” position

Exercise 9: Modified Plank with Shoulder Stabilization

Purpose: Integrate teres muscles into core stability pattern; functional strength training

Starting Position:

• Plank position on forearms and toes
• Forearms parallel, shoulder-width apart
• Core engaged (tight abdominal muscles)
• Neck neutral, looking down
• Body forms straight line from head to heels

Execution:

1. Hold plank position with proper form
2. While maintaining plank, perform scapular protraction (shoulder blade movement)
3. Draw shoulder blades slightly forward (subtle movement)
4. Hold 1 second
5. Retract shoulder blades back (return to neutral)
6. Repeat scapular movement for prescribed reps
7. Maintain plank position throughout

Recommended Dosage:

• 2 sets of 8-10 scapular movements
• Perform 3-4 days per week
• Start with 20-30 second plank holds

Modifications:

• Easier: Perform plank on knees instead of toes
• Harder: Increase plank hold duration to 45-60 seconds, or perform on hands (high plank)

What You Should Feel:

• Core muscles working (abdominals, back extensors)
• Shoulder stabilizers engaging
• No shoulder joint pain

Common Mistakes:

• Hips sagging (not maintaining straight line)
• Hips too high (arching back)
• Not engaging core properly
• Too much neck extension (looking forward instead of down)

Exercise 10: Dumbbell Rows (Posterior Shoulder Focus)

Purpose: Build posterior shoulder and scapular strength in functional pulling pattern

Starting Position:

• Single-leg stance position (optional, increases core demand)
• Dumbbell in one hand, arm extended
• Slight knee bend, neutral spine
• Core engaged

Execution:

1. Pull dumbbell up toward ribcage, keeping elbow close to body
2. Lead with elbow (don’t extend arm first)
3. At top position, squeeze shoulder blade back toward spine
4. Hold 1 second
5. Lower dumbbell with control
6. Complete all reps on one side before switching

Recommended Dosage:

• 3 sets of 10-12 repetitions per arm
• Perform 4-5 days per week
• Start with 8-10 lb dumbbells, progress to 15-20 lbs

Modifications:

• Lighter: Use lighter dumbbells or reduce repetitions
• Harder: Use heavier dumbbells, perform on unstable surface (balance board), or increase repetitions to 15

What You Should Feel:

• Posterior shoulder, upper back, and latissimus muscles working
• Scapular muscles engaging (between shoulder blades)
• No shoulder joint pain

Common Mistakes:

• Using momentum to lift weight
• Elbow positioning away from body (reduces teres engagement)
• Incomplete range of motion
• Rounding shoulders forward at bottom position

Home Exercise Program: Daily Routine Integration

Most patients benefit from performing these exercises 4-6 days per week, with 1-2 rest days. Here’s how to structure your home program:

Daily 15-Minute Program (Level 1-2)

Warm-up (2 minutes):

• Arm circles: 10 forward, 10 backward each arm
• Band pull-aparts: 15 repetitions

Main Work (10 minutes):

1. Sidelying external rotation: 2 sets × 12 reps
2. Prone Y-T-I: 2 sets × 10 reps each position
3. Standing external rotation with band: 2 sets × 12 reps
4. Prone horizontal abduction with external rotation: 2 sets × 10 reps

Stretching (3 minutes):

• Sleeper stretch: 3 × 30 seconds each side
• Cross-body shoulder stretch: 3 × 30 seconds each side

Frequency: 5-6 days per week Duration: 2-4 weeks before progressing

Daily 20-Minute Program (Level 3)

Warm-up (2 minutes):

• Arm circles: 10 forward, 10 backward each arm
• Band pull-aparts: 15 repetitions

Main Work (15 minutes):

1. Resistance band pull-apart: 3 sets × 12 reps
2. Prone “W” to “I” raises: 2 sets × 10 reps
3. Modified plank with shoulder stabilization: 2 sets × 8-10 movements
4. Dumbbell rows (single-leg): 3 sets × 10 reps per arm

Stretching (3 minutes):

• Sleeper stretch: 3 × 30 seconds each side
• Cross-body shoulder stretch: 3 × 30 seconds each side

Frequency: 4-5 days per week (allows recovery) Duration: Weeks 5-8 and beyond (maintenance)

Activity Modification & Ergonomics for Teres Health

Workplace Setup (Especially Important for Desk Workers)

Monitor Position:

• Eye level with top of monitor
• Arm’s length away (approximately 20-26 inches)
• Directly in front of you (not angled)
• Improper positioning places teres muscles in shortened, weakened position

Chair Height:

• Elbows at 90° when hands on keyboard
• Feet flat on floor
• Lower back supported with small curve (lumbar support)
• Seat height positioned so knees are at 90°

Keyboard & Mouse:

• Close to body (not reaching forward)
• Shoulders relaxed, not shrugged
• Elbows at sides, not wing-like
• Wrists neutral (not flexed or extended)

Posture Breaks:

• Every 30-45 minutes, stand and perform 5 shoulder rolls backward
• Perform band pull-aparts (15 reps) each break
• Stretch posterior shoulder (cross-body stretch, 30 seconds each side)
• Walk for 2-3 minutes

Movement Patterns to Avoid (During Recovery Phase)

Until strength is adequate, avoid:

Overhead Reaching: Especially loaded or repetitive

• Reaching for items on high shelves
• Overhead pressing or throwing
• Swimming (competitive)
• Overhead throwing sports

Excessive Internal Rotation:

• Sleeping on affected shoulder
• Repetitive reaching behind back
• Extreme cross-body adduction

Heavy Pulling:

• Heavy resistance rows before strength established
• Excessive chin-ups or pull-ups
• Loaded carrying
• Forceful throwing

Sport-Specific Activity Modifications

For Baseball/Softball Players:

• Avoid throwing until Level 3 exercises completed
• When returning to throwing, start with interval throwing program
• Emphasis on glenohumeral internal rotation deficit (GIRD) prevention
• Posterior shoulder mobility crucial for throwing athletes

For Swimmers:

• Modify stroke mechanics (reduce internal rotation demands initially)
• Focus on external rotation strength before returning to full swimming
• Build endurance gradually
• Address shoulder positioning in water

For CrossFit/Weightlifters:

• Avoid overhead pressing until strength adequate
• Modify pull-ups and muscle-ups (reduce range initially)
• Scale weighted movements (reduce weight, increase reps for endurance)
• Emphasize posterior chain development

Recovery Timeline: What to Expect Week-by-Week

Weeks 1-2: Initial Activation Phase

What’s happening:

• Muscles “waking up” after being underused
• Establishing neural pathways
• Building initial endurance capacity
• Possible mild soreness (acceptable, should resolve within 24 hours)

Expected progress:

• Increased awareness of muscle activation
• Ability to control movement through range
• Reduced pain with daily activities
• Slight improvement in strength (5-10%)

Milestones:

• Can perform sidelying external rotation without compensating with shoulder elevation
• Y-T-I positions becoming easier to maintain
• Band exercises performed without pain

Weeks 3-4: Strength Building Phase

What’s happening:

• Significant strength gains (20-30%)
• Muscle endurance improving
• Load tolerance increasing
• Neuromuscular coordination refining

Expected progress:

• Noticeable strength improvements
• Reduced pain with overhead reaching
• Better shoulder stability
• Improved posture throughout day
• Better tolerance for daily activities (lifting, reaching, carrying)

Milestones:

• Able to perform all Level 2 exercises with proper form
• Pain-free range of motion improving
• Functional activities easier (putting on shirt, reaching overhead, etc.)

Weeks 5-8: Endurance & Advanced Strengthening

What’s happening:

• Muscle endurance significantly improving
• Sport-specific movement patterns integrating teres strength
• Proprioception (body awareness) improving
• Ready for functional activity progression

Expected progress:

• 40-50% strength improvement from baseline
• Pain-free with most daily activities
• Improved shoulder stability during activity
• Better athletic performance (if applicable)
• Lasting improvements in posture

Milestones:

• Completing Level 3 exercises with control
• Returning to modified sport/activity participation
• Pain consistently absent with daily function
• Confidence in shoulder stability improving

Weeks 9-12: Return to Function & Sport

What’s happening:

• Transitioning from rehabilitation to maintenance and performance
• Integrating teres strength into sport-specific demands
• Building muscular endurance for sustained activity
• Establishing long-term maintenance program

Expected progress:

• 50-70% strength improvement (or more)
• Return to desired activities with full participation
• Confidence in shoulder stability
• Pain-free throughout activity

Milestones:

• Full return to sport or activity (if applicable)
• Demonstrating adequate strength and endurance
• Pain-free performance
• Ready for long-term maintenance program

Long-Term Maintenance (Beyond 12 Weeks)

Maintenance program 2-3 days per week prevents re-injury and maintains gains:

• 2 sets × 10-12 reps each exercise
• Progress resistance every 4-6 weeks
• Include posterior shoulder stretching daily
• Maintain ergonomic posture
• Address postural dysfunction regularly

Factors Affecting Timeline:

• Age: Older individuals (50+) may progress 10-15% slower
• Severity: Moderate dysfunction faster (4-6 weeks) vs. severe pain (8-12 weeks)
• Compliance: Consistent training 5-6 days/week progresses faster than 2-3 days/week
• Genetics: Some individuals respond more rapidly to strength training
• Other injuries: Concurrent injuries may slow progress

Prevention & Long-Term Management: Keep These Muscles Strong

Daily Maintenance (After Initial Rehabilitation)

Once you’ve completed the 8-12 week rehabilitation program, prevent re-injury with 15 minutes, 2-3 times per week:

Quick Maintenance Routine:

1. Band pull-aparts: 2 sets × 12 reps
2. Prone Y-T-I holds: 2 sets × 10 reps each position
3. External rotation with band: 2 sets × 12 reps
4. Dumbbell rows: 2 sets × 10 reps per arm
5. Cross-body stretches: 2 × 30 seconds each side

Time commitment: 15 minutes, 2-3 days per week

Posture Awareness (Most Important for Prevention)

The #1 reason patients develop teres dysfunction again: poor posture returns.

Daily posture checklist:

• [ ] Shoulders back and down (not rounded forward)
• [ ] Monitor at eye level (not looking down)
• [ ] Arms close to body when typing
• [ ] Elbows at 90° when seated
• [ ] Feet flat on floor
• [ ] Standing with neutral spine (not hyperextended or flexed)

Posture resets:

• Every 30 minutes: 5 shoulder rolls backward
• Every hour: 30-second cross-body stretch each side
• Before bed: 1-minute posterior shoulder stretch

Lifestyle Modifications That Support Shoulder Health

Sleep Position:

• Avoid sleeping on affected shoulder (compresses teres muscles all night)
• Sleep on back or non-affected side
• Use pillow that keeps neck neutral

Ergonomic Phone Use:

• Don’t hold phone between ear and shoulder
• Use speakerphone or earbuds
• Keep phone at eye level when reading

Bag/Backpack Carrying:

• Avoid heavy bags on single shoulder
• Distribute weight across shoulders
• Consider backpack instead of single-shoulder bag

Desk Setup (Final Check):

• Monitor at arm’s length and eye level
• Keyboard close to body
• Chair with lumbar support
• Standing desk for 20-30% of workday (if possible)

When to See a Doctor: Red Flags & Warning Signs

While most teres dysfunction responds well to physical therapy, certain situations require medical evaluation:

Seek Immediate Medical Attention If:

Severe Injury Mechanism:

• Sudden severe pain with clear injury event
• Unable to move arm at all after injury
• Significant swelling or bruising
• Visible deformity

Persistent Severe Symptoms:

• Severe sharp pain not improving after 2 weeks of proper rehabilitation
• Progressive weakness (getting worse daily)
• Numbness or tingling radiating down arm
• Loss of hand function or coordination

Neurological Symptoms:

• Radiating numbness or tingling into hand
• Weakness spreading to other areas
• Loss of grip strength
• Coordination problems

Unresponsive to Appropriate Treatment:

• No improvement after 4 weeks of consistent PT
• Worsening symptoms despite compliance
• Pain increasing despite adequate rest

Seek Non-Urgent Medical Evaluation If:

• Symptoms persist beyond 6-8 weeks despite proper therapy
• Unable to participate in rehabilitation due to pain
• Questions about whether additional imaging is needed
• Need for second opinion on diagnosis
• Considering surgical options

FAQ:

Q: How long do I need to do these exercises?

A: Most patients see significant improvement within 4-6 weeks of consistent training. However, lifelong maintenance (2-3 times weekly) is recommended to prevent re-injury, especially if you work at a desk or participate in overhead activities. Think of it like dental care—consistent maintenance prevents problems.

Q: Can I do teres exercises if I have a rotator cuff tear?

A: This depends on the severity and type of tear. Some small rotator cuff tears can be rehabilitated with physical therapy, including teres strengthening. However, larger tears or complete tears typically require surgical evaluation. Work with your physical therapist or physician to determine which exercises are appropriate for your specific diagnosis.

Q: How much weight should I use?

A: Start without weight or light resistance bands (Level 1-2). Progress to weights only when you can perform exercises with perfect form and no pain. Generally, use weight that allows 10-15 reps with muscle fatigue in final 2 reps. Lighter weight with perfect form is vastly superior to heavy weight with poor form.

Q: Why are my exercises making my shoulder feel worse?

A: Pain during rehabilitation should resolve within 2-4 hours. If pain is lasting all day or worsening significantly, likely causes include:

• Using too much weight
• Compensatory patterns (using wrong muscles)
• Insufficient rest between sessions
• Not performing adequate stretching
• Underlying condition more severe than diagnosed

Stop exercises causing lasting pain and consult your PT.

Q: Can I swim while doing teres rehabilitation?

A: Swimming is loaded internal rotation, which can stress teres muscles during early rehabilitation. Modify swimming by:

• Using kickboard (no arm movement) early in rehab
• Switching to backstroke (external rotation dominant)
• Using proper form (reduce cross-body reach)
• Waiting until Level 3 (week 5-6) before returning to regular swimming
• Returning gradually with shorter distances

Q: Is physical therapy really necessary, or can I just do exercises at home?

A: Many people successfully progress through home exercises alone. However, professional assessment ensures:

• Correct diagnosis (symptoms similar to rotator cuff injury or nerve involvement)
• Proper exercise technique (form is critical)
• Appropriate progression (not too fast or too slow)
• Identification of compensatory patterns
• Modification for individual needs

If progressing at home, video your exercises and compare to proper form. Consider 1-2 PT sessions for form check.

Q: Why haven’t my rotator cuff exercises fixed my shoulder pain?

A: Many standard rotator cuff programs neglect the teres major and minor, creating a common oversight. Also, pain may result from:

• Postural dysfunction (must be corrected)
• Scapular dyskinesis (shoulder blade not moving properly)
• Thoracic spine stiffness (affects shoulder mechanics)
• Inadequate load progression
• Insufficient activity modification
• Other structures involved (cervical spine, AC joint, etc.)

Comprehensive assessment by physical therapist often reveals missing components.

Q: Can I get injured doing these exercises?

A: Teres exercises are low-risk when performed correctly. Injury risk increases with:

• Using too much weight too fast
• Ignoring pain signals
• Poor form/compensatory patterns
• Inadequate warm-up
• Excessive frequency (every day without rest)
• Pushing through sharp pain

Start conservatively, prioritize form over intensity, and listen to your body.

Q: How do I know if I’m making progress?

A: Track these markers:

• Strength: Can you do more reps or use more weight?
• Pain: Is pain decreasing during daily activities?
• Function: Can you reach, lift, throw, or swim without pain?
• Endurance: Can you sustain activities longer?
• Posture: Are shoulders more retracted and stable?

Keep a simple log: date, exercises, weight, reps, pain level (0-10). Review monthly—improvement is often gradual.

Conclusion: Teres Muscles Are Key to Lasting Shoulder Health

The teres major and minor are small muscles with outsized importance. Weakness or dysfunction in these muscles causes or contributes to a significant percentage of shoulder pain cases—yet they’re frequently overlooked in standard rehabilitation programs.

The good news: These muscles respond rapidly to targeted exercise. Most people notice meaningful improvements within 3-4 weeks of consistent training, and significant strength gains within 8-12 weeks.

Your path forward:

1. Start with Level 1 activation exercises (Weeks 1-2)
2. Progress to Level 2 strength building (Weeks 3-4)
3. Advance to Level 3 advanced exercises (Weeks 5-8)
4. Establish maintenance routine (ongoing, 2-3x weekly)

Combined with proper posture, ergonomic setup, and activity modification, teres strengthening creates lasting shoulder stability and freedom from pain.

If you’re experiencing shoulder pain, don’t assume it’s just your rotator cuff. Have a physical therapist assess whether teres muscle dysfunction is part of your problem. Odds are, it is—and once addressed, your shoulder health will dramatically improve.

Medical Review & Authority

This article was reviewed by:

• Mustajab Bukhari, DPT(Licensed Physical Therapist, Board-Certified Sports Specialist)
• Ahmad Wassi, MSPT (Physical Therapist Specialist in Shoulder Rehabilitation)

Evidence-Based Sources:

1. Cools AM, et al. (2015). “The role of the scapula in the shoulder pain.” Journal of Orthopaedic & Sports Physical Therapy, 45(2), 149-157.
2. Kibler WB, et al. (2013). “The role of core stability in athletic function.” Sports Medicine, 43(6), 457-465.
3. Reinold MM, et al. (2009). “Posterior shoulder tightness in overhead athletes.” American Journal of Sports Medicine, 37(3), 521-528.
4. Ludewig PM, Reynolds JF. (2009). “The association of scapular kinematics and glenohumeral joint pathologies.” Journal of Sports Physical Therapy, 39(2), 86-97.
5. Phadke V, et al. (2011). “Scapular and rotator cuff muscle activity during arm elevation.” Clinical Biomechanics, 26(6), 595-603.

Disclaimer: This article is for educational purposes and should not replace professional medical advice. Always consult with a healthcare provider before starting any exercise program, especially if you have existing shoulder pain or injury. Individual needs vary; exercises should be modified based on personal assessment by a qualified professional.

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Dr. Mustajab PT

Dr. Mustajab Haider Bukhari (PT) is the Founder and Owner of Cure On Call and a qualified physiotherapist based in Faisalabad, Pakistan. He specialises in musculoskeletal rehabilitation, chronic pain management, and post-injury recovery through evidence-based physiotherapy. Dr. Bukhari has extensive experience providing patient-centred care through in-clinic and home-based physiotherapy services. Under his leadership, Cure On Call integrates physiotherapy with nutrition and remote care to deliver holistic, accessible healthcare solutions.