Muscles/Shoulder

Shoulder

infraspinatus muscle

in-frah-spin-AY-tus

Infraspinatus caps the back of the shoulder blade, externally rotating the arm for throwing and serving. Key rotator cuff muscle for shoulder stability in presses and pulls.

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Common Pain & Injury

Deep shoulder ache, pain with external rotation. Impingement common. Doc for weakness.

Anatomy & Function

Origin

Infraspinous fossa of scapula (back shoulder blade hollow)

Insertion

Greater tubercle of humerus (top outer arm bone)

Actions

Shoulder external rotation (arm out)
Stabilizes humeral head

Innervation

Suprascapular nerve (C5-C6)

Muscle Relationships

Antagonists

SubscapularisPectoralis major

Synergists

Teres minorPosterior deltoid

Trigger Points

Fossa center; refers across shoulder, down arm to elbow.

Stretches

1Sleeper stretch

2Cross-body shoulder stretch

3External rotation doorway stretch

Common Conditions

Infraspinatus tendinopathyRotator cuff tearSuprascapular neuropathy

Anatomical Parts

Right infraspinatus muscleLeft infraspinatus muscle

FAQ

Why does my infraspinatus hurt?

Overhead overuse; points refer to front shoulder and arm.

Infraspinatus stretch?

Sleeper pose or cross-body adduction.

Strengthen infraspinatus?

Side-lying external rotation with light dumbbell.

Infraspinatus pain lifting arm?

Rotator cuff strain; rehab with bands.

Exercises for infraspinatus muscle

20

Alternating Cable Shoulder Press position 1

Alternating Cable Shoulder Press position 2

Alternating Cable Shoulder Press

beginner·cable

Alternating Deltoid Raise position 1

Alternating Deltoid Raise position 2

Alternating Deltoid Raise

beginner·dumbbell

Alternating Kettlebell Press position 1

Alternating Kettlebell Press position 2

Alternating Kettlebell Press

intermediate·kettlebells

Anti-Gravity Press position 1

Anti-Gravity Press position 2

Anti-Gravity Press

beginner·barbell

Arm Circles position 1

Arm Circles position 2

Arm Circles

Arnold Dumbbell Press position 1

Arnold Dumbbell Press position 2

Arnold Dumbbell Press

intermediate·dumbbell

Back Flyes - With Bands position 1

Back Flyes - With Bands position 2

Back Flyes - With Bands

beginner·bands

Backward Medicine Ball Throw position 1

Backward Medicine Ball Throw position 2

Backward Medicine Ball Throw

beginner·medicine ball

Band Pull Apart position 1

Band Pull Apart position 2

Band Pull Apart

beginner·bands

Barbell Incline Shoulder Raise position 1

Barbell Incline Shoulder Raise position 2

Barbell Incline Shoulder Raise

beginner·barbell

Barbell Rear Delt Row position 1

Barbell Rear Delt Row position 2

Barbell Rear Delt Row

beginner·barbell

Barbell Shoulder Press position 1

Barbell Shoulder Press position 2

Barbell Shoulder Press

intermediate·barbell

Battling Ropes position 1

Battling Ropes position 2

Battling Ropes

beginner·other

Bent Over Dumbbell Rear Delt Raise With Head On Bench position 1

Bent Over Dumbbell Rear Delt Raise With Head On Bench position 2

Bent Over Dumbbell Rear Delt Raise With Head On Bench

beginner·dumbbell

Bent Over Low-Pulley Side Lateral position 1

Bent Over Low-Pulley Side Lateral position 2

Bent Over Low-Pulley Side Lateral

beginner·cable

Bradford/Rocky Presses position 1

Bradford/Rocky Presses position 2

Bradford/Rocky Presses

beginner·barbell

Cable Internal Rotation position 1

Cable Internal Rotation position 2

Cable Internal Rotation

beginner·cable

Cable Rear Delt Fly position 1

Cable Rear Delt Fly position 2

Cable Rear Delt Fly

beginner·cable

Cable Rope Rear-Delt Rows position 1

Cable Rope Rear-Delt Rows position 2

Cable Rope Rear-Delt Rows

beginner·cable

Cable Seated Lateral Raise position 1

Cable Seated Lateral Raise position 2

Cable Seated Lateral Raise

beginner·cable

Also Works infraspinatus muscle

10

Ab Roller position 1

Ab Roller position 2

Ab Roller

intermediate·other

Advanced Kettlebell Windmill position 1

Advanced Kettlebell Windmill position 2

Advanced Kettlebell Windmill

intermediate·kettlebells

Alternating Floor Press position 1

Alternating Floor Press position 2

Alternating Floor Press

beginner·kettlebells

Around The Worlds position 1

Around The Worlds position 2

Around The Worlds

intermediate·dumbbell

Barbell Ab Rollout position 1

Barbell Ab Rollout position 2

Barbell Ab Rollout

intermediate·barbell

Barbell Ab Rollout - On Knees position 1

Barbell Ab Rollout - On Knees position 2

Barbell Ab Rollout - On Knees

expert·barbell

Barbell Bench Press - Medium Grip position 1

Barbell Bench Press - Medium Grip position 2

Barbell Bench Press - Medium Grip

beginner·barbell

Barbell Guillotine Bench Press position 1

Barbell Guillotine Bench Press position 2

Barbell Guillotine Bench Press

intermediate·barbell

Barbell Incline Bench Press - Medium Grip position 1

Barbell Incline Bench Press - Medium Grip position 2

Barbell Incline Bench Press - Medium Grip

beginner·barbell

Barbell Rollout from Bench position 1

Barbell Rollout from Bench position 2

Barbell Rollout from Bench

intermediate·barbell

Related Shoulder Muscles

The deltoid is the rounded shoulder cap muscle with anterior, middle, and posterior fibers covering the shoulder joint. It abducts, flexes, and extends the arm for raises and presses. Builds the V-taper and protects the rotator cuff.

The subscapularis is the anterior rotator cuff muscle filling the scapula's subscapular fossa. It internally rotates the arm and stabilizes the shoulder joint. Crucial for fitness in presses, pulls, and preventing dislocations.

The supraspinatus tops the rotator cuff on scapula's fossa, initiating shoulder abduction. Vital for overhead presses and impingement prevention in weight training.

The teres major is a thick muscle from lower scapula to humerus, adducting and internally rotating the arm. 'Lat's little helper' for pulling exercises like rows and pull-ups.

The teres minor is a narrow rotator cuff muscle on scapula's lateral border, externally rotating and stabilizing the shoulder. Key for throwing and pressing without winging.

Shoulder Pain Guide

Common causes and relief

Activities & Sports

See which activities use infraspinatus muscle