Protocol LibraryPreparation & Movement Protocols → Posterior Shoulder Relaxation (90‑90)

Posterior Shoulder Relaxation (90‑90)

Position-specific posterior shoulder relaxation and motor-control drill
PROTOCOL OVERVIEW
Recovery & Reset (Off-Wall)
System
Recovery / motor control
Target
Posterior shoulder tension in the 90–90 position
Primary Goal
Reduce unnecessary posterior shoulder tension while maintaining controlled external rotation and scapular stability
Intensity
1–3/10
Tempo
20–45 s ON / 15–30 s OFF
Main Work
1–3 sets × 20–45 s @ 1–3/10

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Purpose

Reduce unnecessary posterior shoulder tension in the 90–90 position while maintaining relaxed scapular control

Use this exercise if

  • The back of the shoulder feels tight or guarded after climbing
  • External rotation in the 90–90 position feels restricted by muscular tension
  • Tension tends to accumulate in the posterior deltoid or teres region
  • You can reach the position, but relaxing into it is difficult

When

  • After climbing sessions
  • As a short standalone recovery / motor-control session
  • On recovery days when the shoulder feels locally tense
  • Not intended as a general warm-up

Starting position

  • Stand or sit in a stable position
  • Bring the arm into a 90–90 position: upper arm roughly at shoulder height, elbow bent to 90°
  • Keep the forearm vertical or slightly forward of vertical to start
  • Keep the ribs gently down and the pelvis neutral to slightly tucked
  • Let the neck and upper trapezius remain relaxed
  • Set the scapula gently without forceful depression or retraction

Execution

  • Slowly rotate the forearm backward into external rotation.
  • Stop when mild posterior shoulder tension first appears
  • Hold that position while breathing calmly
  • Allow the posterior shoulder to gradually soften without forcing additional range
  • Maintain gentle scapular control throughout
  • If tension shifts into the neck, upper trapezius, or anterior shoulder, reduce the range
  • After the hold, return slowly to the starting position

Dosage

  • 1–3 sets
  • 20–45 s per hold
  • 15–30 s rest between sets
  • Effort ~1–3/10
  • Perform per side as needed

Important

  • This is not an external-rotation strengthening exercise
  • The goal is to reduce guarding and improve comfortable control in the 90–90 position
  • More range is not automatically better
  • Stop or modify the drill if discomfort increases

Expected effects

  • Reduced posterior shoulder tension
  • More comfortable 90–90 positioning
  • Easier external rotation under very light load
  • Less guarding through the posterior deltoid / teres region
  • Better scapular control with lower overall effort
  • Reduced residual shoulder stiffness after climbing
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