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Prone T with External Rotation

Draftstrength90%intermediate⬤ strong evidence
View FHIR resourceFHIR R4 ActivityDefinition — the interoperable form of this exercise

Positions & Range of Motion

Start
Prone, forehead on a towel, arms abducted to 90° in a T position with thumbs pointing up
End
Arms lifted toward the ceiling with shoulders externally rotated and scapulae retracted/depressed, elbows drawn toward the back hip pockets
Range of Motion
Arms lift a few inches off floor; 90° horizontal abduction with scapular retraction/depression to end range

How to Perform

Prone with arms abducted 90° in a T, thumbs up. Lift arms toward ceiling while externally rotating shoulders and retracting/depressing scapulae.

Watch on YouTube↗

Opens a YouTube search for “Prone T with External Rotation”

Starting position: prone

Coaching Cues

  1. 1

    Long spine — middle traps and rhomboids drive the lift

    (verbal)
  2. 2

    Lift the thumbs toward the far ceiling corners

    (verbal)
  3. 3

    Pull the elbows toward the back hip pockets

    (verbal)
  4. 4

    Forehead rests on a towel — neck stays neutral

    (tactile)

Evidence-Based Dosing & EMG Data

Recommended Dosing

3×10–15, 3×/week × 6–12 weeks; 1–3 lb progressing to 5 lb

EMG Activation Data

Middle trap >50% MVIC; lower trap >50% MVIC; upper trap <20% MVIC. UT:MT ratio 0.43, UT:LT 0.30 [Mendez-Rebolledo 2024].

Muscles Involved (8)

Primary Movers

Middle Trapezius— >50% MVIC
Lower Trapezius— >50% MVIC

Secondary Movers

Rhomboid Major— 25–45% MVIC
Infraspinatus
Posterior Deltoid

Stabilizers

Upper Trapezius— <20% MVIC — intentionally low

Lengthened / Stretched

Pectoralis Major— AUDIT: The T position (horizontal abduction + retraction) lengthens the pectoralis major on the stretched side.
Anterior Deltoid— AUDIT: Horizontal abduction lengthens the horizontal-adductor anterior deltoid.

Easier Variations ↓

1

Incline Prone T

Perform on an incline bench (30–45°) to reduce gravity load.

Harder Variations ↑

1

Add Light Dumbbells

Progress from 1–3 lb to 5 lb while maintaining ratios.

2

Prone Y-Raise

Move to 135° abduction for greater lower trap activation.

3

Progress to prone-y-raise

AUDIT: Advance from the T (90 degrees) to the Y (135 degrees) for greater lower-trapezius demand (listed as prone-T progression).

Target Movements (4)

Scapular RetractionScapulothoracic Articulation
Scapular DepressionScapulothoracic Articulation
Shoulder Horizontal AbductionGlenohumeral Joint
Shoulder External RotationGlenohumeral Joint

Why This Exercise Matters

Everyday activities this exercise helps you do — essential means it directly trains the capacity the task needs:

Posture MaintenanceessentialPulling (Doors, Drawers)Reaching Overhead

Goals This Helps With

Rehab, performance, prevention, and mobility goals this exercise supports — essential means it's a cornerstone:

Subacromial Shoulder PainrehabShoulder Injury PreventionpreventionRotator Cuff TendinopathyrehabImprove Overhead Pressingperformance