An Exercise for Lower Left Back Pain and Lower Right Back Pain!

Seated Leg-Butt Raise (Basic), Start Position:-

Sit in a chair, knees same height as pelvis.
Place hands on chair to side of buttocks.
Pelvic Neutral and spine lengthening upward.
Anchor your scapulas.
Chin gently tucked.

Seated Leg-Butt Raise (Basic):- Action

(Stay relaxed: no zip and hollow just yet):Lift your left foot slightly off the ground and feel the weight of your pelvis shift over to the left buttock. Take note if your left knee has shifted backward (see diagram).
Zip & hollow, & lift your left buttock so that your weight is transferred to the right buttock.
Maintain zip and hollow, and position your left knee to be level with your right.
Hold the position for two breathes, and relax.
Repeat both sides, two to five times.

The Seated Leg-Butt Raise (Advanced):- Action

Same as for Basic, but this time place your hands on your thighs, & use your right leg to push yourself firmly into the back of the chair.

lower pain on left side of back, pictures (Scroll right>>>...)

Pictures, Leg-Buttock Raise, Start Position & Action:-
Basic:-	Advanced:-
Left Leg and butt raised:- Left Knee is behind right knee. The lumbar spine has twisted, & the pelvis is "looking to the left":-	Left Leg and butt raised:- The subject has corrected his lumbar spinal twist and aligned his pelvis so that the knees are now level.

What this exercise does-

Specifically enhances the internal abdominal oblique muscle on the side or sides that your pelvis tends to look towards.
It thus goes a long way to minimizing left or right sided lower back pain.

Comments
Chiropractors often treat the following complaints:-

lower pain on left side of back
lower left back and buttocks pain
lower right back pain
right quadrant lower back pain
severe pain in lower right side of back
pelvic torqued causing alignment problems

The issues are complex and experts cannot even use a uniform set of terms, let alone communicate treatments to their patients! Only physiotherapist Shirley Sahrmann has seriously attempted to categorize & describe left or right sided lower back pain. Her syndromes are (in order of observed frequency):-

Lumbar Rotation-extension syndrome
Lumbar extension syndrome
Lumbar rotation syndrome
Lumbar Rotation-flexion syndrome
Lumbar Flexion syndrome

This author simplifies back pain therapy by identifying & correcting "left or right looking pelvis", & using the Pilates concept of pelvic neutral to encourage the client to avoid extremes of lumbar flexion and/or extension(2).
Reference

Shirley A Sahrman: "Movement Impairment Syndromes" Publ. Mosby, 2002 ISBN 0-8016-7205-8
Bruce Thomson Left Looking_Pelvis