Quadratus lumborum

Schematic anatomy
Deep layerQuadratus lumborum

Core

Rectus abdominisInternal & external obliquesTransversus abdominis

Deep trunk

MultifidusQuadratus lumborumDiaphragmPelvic floor
Movement guide

Quadratus lumborum

Connects the pelvis, lumbar spine, and lowest rib; resists side bending.

01

Suitcase carry

Lateral trunk stability · Dumbbell

Also works

Obliques, spinal extensors; forearm and shoulder muscles carry the load

How to perform

Carry one moderate dumbbell at your side and walk steadily without leaning. Switch hands.

Keep the pelvis level and breathe throughout.

Example volume · 2–3 carries × 15–30 metres / side

02

Side plank

Isometric · Bodyweight

Also works

Obliques, gluteus medius; shoulder stabilizers

How to perform

Support yourself on one forearm and the side of your foot. Lift your hips to form a straight line. Use bent knees to reduce difficulty.

Stack the shoulder above the elbow and breathe steadily.

Example volume · 3 sets × 20–40 sec / side

Referencesopenstax.org

Community draft · awaiting expert review