Why Every Athlete Needs to Target the Rotator Cuff for Strength

By Dr. Carmen Jansante, PT, DPT, CSCS | Undefeated Physical Therapy and Performance

When most athletes think about building a stronger shoulder, they picture big pressing movements, pull-ups, or heavy rows. While those are all important, there’s one group of muscles that often gets overlooked — and it’s one of the most critical for shoulder health and performance: the rotator cuff.

What Is the Rotator Cuff?

The rotator cuff is made up of four muscles:

• Supraspinatus

• Infraspinatus

• Teres Minor

• Subscapularis

Three of these wrap from the back of the shoulder, while one (the subscapularis) wraps from the front. Together, they serve as the dynamic stabilizers of the shoulder, keeping the ball of the humerus centered in the socket during movement.

Without a strong rotator cuff, the bigger shoulder muscles (like the deltoids and traps) tend to take over. This creates imbalances, puts athletes at risk for injury, and can limit performance in overhead sports like baseball, softball, volleyball, and swimming.

Why Rotator Cuff Strength Matters

• Injury Prevention: A weak or imbalanced cuff can’t stabilize the shoulder, increasing the chance of impingement, labral tears, or tendon issues.

• Performance: A strong cuff allows the shoulder to generate power safely, especially in high-velocity movements like throwing or serving.

• Longevity: Training these muscles reduces overuse breakdown and helps athletes keep playing at a high level for longer.

At Undefeated Physical Therapy, we make sure to target the rotator cuff in all positions — overhead, at the side, lying on your stomach — because the shoulder needs stability in every range of motion.

The Best Rotator Cuff Exercises (Backed by Science)

Research using electromyography (EMG) — where tiny needles are placed into the muscles to measure activation — has shown which movements recruit the cuff most effectively. Here are some of the most powerful:

1. Side-Lying External Rotation

• Lie on your side with your top elbow bent to 90° and a rolled towel under your arm.

• Start with your hand at your belly button, then rotate it upward until your hand is parallel to the floor.

• Slowly lower back down.

• Reps: 8–15 (ideal for hypertrophy and endurance).

This simple move has some of the highest EMG activity for the external rotators.

2. Prone “Full Can” Lift (Prone Y)

• Lie face down on a table or bench with your arms hanging down.

• Raise one arm up at a 45° angle between your front and side (like a “Y”), thumbs pointing up.

• Lower under control.

• Target: Supraspinatus and lower trap for strong overhead stability.

3. Prone T’s and I’s

• From the same position, raise your arms straight out to the side (T’s) or straight overhead (I’s).

• Great for scapular stability and balanced shoulder mechanics.

4. Banded Wall Walks

• Place a resistance band around your wrists.

• Stand facing a wall with elbows bent and forearms pressing into the wall.

• Walk your hands upward, keeping tension in the band (from chin to forehead height), then walk back down.

• Reps: ~5 quality walks.

• Excellent for training cuff stability in a functional, closed-chain position.

  
  

The Bottom Line

The rotator cuff might not be flashy, but it’s the foundation of a healthy, high-performing shoulder. Without it, the risk of pain, breakdown, and lost playing time goes way up.

At Undefeated PT & Performance, we don’t just rehab shoulders after injury — we train athletes to keep them strong in every range, so they can throw harder, swing faster, and perform at their peak for years to come.

👉 Want to know if your rotator cuff is holding you back?

Schedule a Shoulder & Arm Care Assessment with Dr. Carmen Jansante today and learn exactly where your shoulder strength and stability stand.

📅 Book Your Assessment Here