Shoulder pain is one of the most common musculoskeletal complaints, and injuries to the Rotator Cuff are often the cause. The rotator cuff is made up of four small but powerful muscles that stabilize and move the shoulder joint.
One of the most important of these muscles is the Infraspinatus Muscle.
The infraspinatus plays a major role in external rotation of the shoulder and helps stabilize the shoulder during overhead movements and reaching activities.
When the infraspinatus becomes weak or injured, it can lead to:
- shoulder pain
- limited shoulder mobility
- weakness during lifting or reaching
- compensations that affect the neck and upper back
As a physical therapist, I frequently see shoulder pain caused by weakness in the rotator cuff muscles.
In this guide, you’ll learn 11 effective infraspinatus exercises used in physical therapy to strengthen the rotator cuff, improve shoulder stability, and reduce pain.
Quick Answer: Best Infraspinatus Exercises
The most effective exercises for strengthening the infraspinatus include:
- Infraspinatus stretch
- Prone angels
- Horizontal shoulder abduction
- Side-lying wiper exercise
- Side-lying external rotation
- Resistance band external rotation
- Face pulls
- 90/90 resistance band external rotation
- Wall angels
- Prone T’s
- Lateral raises
These exercises combine external rotation strengthening, shoulder stability, and mobility work, which are essential for healthy rotator cuff function.
Medical Disclaimer
This article is for educational purposes only and does not replace medical advice. If you suspect a shoulder injury, consult a healthcare professional before starting a new exercise program.
Rotator Cuff Anatomy
The rotator cuff is composed of four muscles that surround and stabilize the shoulder joint:
- Supraspinatus Muscle
- Infraspinatus Muscle
- Teres Minor Muscle
- Subscapularis Muscle
These muscles work together to stabilize the Glenohumeral Joint and allow the shoulder to move safely through a wide range of motion.
What the Infraspinatus Muscle Does
The infraspinatus is primarily responsible for external rotation of the shoulder, meaning it rotates the arm outward away from the body.
This movement is used during many daily activities such as:
- reaching behind your head
- lifting objects
- throwing a ball
- brushing your hair
When functioning properly, the infraspinatus helps keep the shoulder joint stable and balanced.
Common Causes of Infraspinatus Pain
Pain in the infraspinatus muscle often occurs as part of a Rotator Cuff Tear or overuse injury.
Common causes include:
- repetitive overhead sports
- Tennis shoulder is a common shoulder injury that presents slightly differently than infraspinatus shoulder pain.
- These are the 10 Best Shoulder Exercises For Athletes.
- weight training
- poor shoulder mechanics
- muscle imbalances
- trauma or falls
Athletes who play sports such as baseball, swimming, or tennis often place higher stress on the rotator cuff.
Guidelines Before Starting Infraspinatus Exercises
Before beginning these exercises, keep the following guidelines in mind:
- Start with light resistance
- Focus on slow, controlled movements
- Avoid sharp or worsening pain
- Progress gradually
A mild muscle burn is normal, but exercises should never cause sharp shoulder pain.
11 Best Infraspinatus Exercises
These exercises are commonly used in physical therapy to strengthen the rotator cuff.
1. Infraspinatus Stretch
Purpose: Improves flexibility of the posterior shoulder.
How to perform:
- Hold a towel or stretch band behind your back.
- Use the opposite arm to gently pull the band upward.
- Hold the stretch for 20–30 seconds.
2. Prone Angel
Purpose: Strengthens the upper back and rotator cuff.
How to perform:
- Lie on your stomach.
- Bend your elbows into a “W” shape.
- Raise your arms slightly while squeezing the shoulder blades.
- Slowly return to start.
3. Horizontal Shoulder Abduction
Purpose: Strengthens the posterior shoulder muscles.
How to perform:
- Hold a resistance band with arms extended in front of you.
- Pull the band apart while keeping arms straight.
- Slowly return to start.
4. Side-Lying Wiper Exercise
Purpose: Strengthens external rotator muscles.
How to perform:
- Lie on your side.
- Bend your elbow to 90 degrees.
- Rotate the arm upward toward the ceiling.
- Lower slowly.
5. Side-Lying External Rotation
Purpose: One of the best exercises for isolating the infraspinatus.
How to perform:
- Lie on your side with the working arm on top.
- Hold a light dumbbell.
- Rotate the arm upward while keeping the elbow close to your side.
- Slowly lower back down.
6. Resistance Band External Rotation
Purpose: Strengthens the rotator cuff.
How to perform:
- Anchor a resistance band at elbow height.
- Keep your elbow bent at 90 degrees.
- Rotate your arm outward away from your body.
- Slowly return to start.
7. Face Pulls
Purpose: Strengthens the upper back and rotator cuff.
How to perform:
- Anchor a band at shoulder height.
- Pull the band toward your face.
- Keep your elbows high and squeeze the shoulder blades.
8. 90/90 External Rotation
Purpose: Strengthens the shoulder in an overhead position.
How to perform:
- Raise your arm to shoulder height.
- Bend the elbow to 90 degrees.
- Rotate the arm backward against resistance.
9. Wall Angels
Purpose: Improves posture and shoulder mobility.
How to perform:
- Stand with your back against a wall.
- Place your arms against the wall in a goalpost position.
- Slide your arms upward slowly.
10. Prone T’s
Purpose: Strengthens the posterior shoulder and upper back.
How to perform:
- Lie on your stomach with arms extended to the side.
- Lift your arms slightly off the ground.
- Slowly return to start.
11. Lateral Raises
Purpose: Strengthens the shoulder and stabilizing muscles.
How to perform:
- Hold light dumbbells at your sides.
- Raise your arms to shoulder height.
- Slowly lower them back down.
Looking for more shoulder exercises? These are the 15 Most Helpful Exercises To Avoid Shoulder Replacement Surgery.
Recommended Sets and Repetitions
For most rotator cuff strengthening programs:
| Exercise Type | Sets | Reps |
|---|---|---|
| Stretching exercises | 2–3 | 20–30 second hold |
| External rotation exercises | 2–3 | 10–15 reps |
| General strengthening exercises | 2–3 | 8–12 reps |
Exercises can typically be performed 3–4 days per week.
Always progress gradually and avoid increasing resistance too quickly.
Other Rotator Cuff Muscles
Although this article focuses on the infraspinatus, other rotator cuff muscles are also important.
Supraspinatus
The supraspinatus assists with shoulder abduction, helping lift the arm away from the body.
You can find the 8 Best Subscapularis Muscle Exercises For Rotator Cuff here.
Teres Minor
The teres minor also contributes to external rotation of the shoulder.
Many exercises in this guide strengthen both the infraspinatus and teres minor.
Often times, rotator cuff injuries are a result of other dysfunction such as scapular dyskinesia. This will show you 7 Exercises To Fix Scapular Dyskinesia.
Frequently Asked Questions
What does the infraspinatus muscle do?
The infraspinatus externally rotates the shoulder and stabilizes the shoulder joint during arm movements.
What causes infraspinatus pain?
Common causes include:
- rotator cuff tears
- repetitive overhead activity
- muscle imbalances
- shoulder overuse injuries
How do you strengthen the infraspinatus?
Exercises that involve external rotation, such as side-lying external rotation and resistance band rotations, are the most effective.
How long does it take for rotator cuff injuries to heal?
Mild injuries may improve within 4–6 weeks, while more severe injuries may require several months of rehabilitation.
Summary
The infraspinatus muscle may be small, but it plays a major role in shoulder stability and movement.
Strengthening this muscle can help:
- reduce shoulder pain
- improve mobility
- prevent future injuries
- restore proper shoulder mechanics
Adding these 11 infraspinatus exercises into your routine can improve shoulder strength, stability, and long-term joint health.
If shoulder pain persists, consulting a physical therapist can help identify the cause and create a personalized treatment plan.
Need Help With Your Recovery?
Still struggling with infraspinatus or shoulder pain while returning to activity? I offer virtual coaching sessions to help active adults recover from injuries.
Katie Good, PT, DPT, CSCS is a licensed physical therapist and strength coach specializing in injury rehabilitation and exercise-based recovery. After tearing her ACL four times and going through extensive rehab herself, she became passionate about helping others recover from injuries and return to the activities they love. Through her website and virtual coaching sessions, Katie shares evidence-based physical therapy exercises designed to reduce pain, improve movement, and build strength.