Mighty Nimble
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Intermediate Shoulder Instability Routine

A shoulder-stability focused session emphasizing rotator cuff control, scapular strength, and pain-free range of motion.

Warm-Up

5 minutes. Increase blood flow and groove pain-free shoulder and scapular motion.

Arm Circles
Arm Circles30 sec
Scapular Wall Slides
Scapular Wall Slides45 sec
Band Pull-Apart
Band Pull-Apart30 sec
2 rounds · 15 sec rest

Circuit A

Rotator Cuff Control. Elbow tucked at your side (use a towel roll if helpful). Move slowly; stop short of discomfort.

Band External Rotation
Band External Rotation10x each side
Band Internal Rotation
Band Internal Rotation10x each side
Band Pull-Apart
Band Pull-Apart12x
3 rounds · 15 sec rest
1 min rest

Circuit B

Scapular Upward Rotation & Serratus. Keep ribs down; reach long through the arms without shrugging.

Scapular Push-Up
Scapular Push-Up12x
Serratus Wall Slides
Serratus Wall Slides10x
Prone Y-T Raise
Prone Y-T Raise8x
2 rounds · 15 sec rest
1 min rest

Finisher

Lateral Core + Shoulder Stability. Stack shoulder over elbow/wrist. Keep the shoulder blade gently engaged and avoid sinking.

Side Plank
Side Plank30 sec each side
2 rounds · 15 sec rest

Cool-Down

2–3 minutes. Downshift and reinforce relaxed, pain-free shoulder motion.

Scapular Wall Slides
Scapular Wall Slides30 sec
Arm Circles
Arm Circles30 sec
2 rounds · 15 sec rest
Rotator Cuff Sequencing: Inside Out

Rotator Cuff Sequencing: Inside Out

Band external and internal rotation directly load the infraspinatus, teres minor, and subscapularis — the muscles responsible for centering the humeral head in the glenoid fossa. Pairing these with Prone Y-T Raises recruits the lower trapezius and serratus anterior simultaneously, building the force-couple balance that unstable shoulders chronically lack.

Why Shoulder Instability Demands Scapular Control

Why Shoulder Instability Demands Scapular Control

An unstable glenohumeral joint compensates by losing scapulothoracic rhythm — the coordinated upward rotation and posterior tilt that creates a stable base for arm movement. Scapular Wall Slides and Serratus Wall Slides specifically retrain this rhythm, addressing the root dysfunction rather than just the painful joint.

Building Stability Before Loading Strength

Building Stability Before Loading Strength

This routine follows a proximal-to-distal sequencing principle: scapular stabilizers are activated first so the rotator cuff operates from a stable platform rather than compensating for a moving base. The Side Plank adds anti-lateral-flexion core stiffness, which reduces compensatory shoulder elevation under load — start there if any exercise provokes impingement-like symptoms.

Intermediate Shoulder Instability Routine | Mighty Nimble | Mighty Nimble