Quadratus Lumborum and Multifidus: Sharp Lower Back Pain After a Random Floor Lift

Dear reader,

Today a client in his fifties came in with sharp lower back pain after lifting something random from the floor two days earlier. The pain sat around the sacrum and along the iliac crest. The body language was classic: careful steps, guarded turning, and that subtle fear of bending that makes a grown man move like he is carrying a tray of tea.

What I found in the pattern

Overactive hamstrings

The hamstrings were gripping hard, pulling the pelvis into a protective position. When hamstrings take over, they turn the hips into a stiff hinge and the lower back becomes the emergency stabiliser.

Overactive quadratus lumborum

The quadratus lumborum often clamps near its attachment on the iliac crest when the system senses threat. This can create sharp, local pain and a feeling of one side locking down.

Posterior pelvic tilt and a flatter lumbar curve

A flat lower back with posterior pelvic tilt is frequently a sign of bracing. Instead of sharing load between hips and trunk, the body chooses stiffness as a safety strategy.

Suspected underworking glutes and quiet deep stabilisers

In these cases, glute max and glute med often do not contribute well at the moment of the lift, and multifidus can switch off when pain and threat signals rise. Then the big superficial muscles do the job of the small precise ones, and everyone gets tired fast.

Why sacrum and iliac crest get angry

A sudden lift is rarely performed with perfect sequencing.

If the hips do not take load cleanly, the pelvis tries to stabilise by pulling from hamstrings.

If the pelvis is not stable, QL grabs the iliac crest to stop motion.

If segmental control is reduced, multifidus cannot fine tune the lumbar spine under load.

Result: local overload at the lumbopelvic junction, felt around the sacrum and the top rim of the pelvis.

The JANMI Full Chain Reset logic

I do not treat this as just a “lower back problem”. I treat it as a load sharing problem across the full chain:

Foot knee hip pelvis ribcage scapula

When one link is not doing its job, the pelvis and lower back compensate. A random floor lift just exposes the weakness that was already waiting quietly in the background.

What a proper reset focuses on

Reduce protective overactivity without fighting the nervous system;

Restore better hip contribution so the back stops being the main lifter;

Rebuild segmental control so the spine feels safe to move again;

Re-check the full chain so the same story does not repeat with the next innocent suitcase or shopping bag.

If you are in Marylebone and this sounds familiar, it is worth getting assessed properly early. These patterns respond best when addressed before the compensation becomes normal.

Disclaimer

This content is for general education only and does not constitute medical advice, diagnosis, or treatment. If pain is severe, worsening, follows a significant injury, or includes numbness, tingling, leg weakness, fever, unexplained weight loss, or any bladder or bowel changes, seek urgent medical assessment.

Until next time,

Paulius