Lower Back Pain? Explore the Muscles That May Be Involved
Lower back discomfort, stiffness and restricted movement can involve several different muscles depending on where you feel it, what movements aggravate it and how it began.
JSM Reset helps you explore the muscles that may be contributing to your symptoms and guides you through targeted self-resisted stretching and mobility.
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Why Does My Lower Back Feel Tight or Sore?
Lower back discomfort may be influenced by muscle tension, posture, repetitive activity, prolonged positions, lifting, and movement demands. The way you use your lower back throughout the day — at a desk, lifting, standing, or during physical work — can all play a role.
Different muscles in the lower back and hip can become tight or restricted for different reasons, and the location and quality of the discomfort you feel can vary. This is why understanding which muscles may be involved can help you explore more targeted self-care.
Lower back pain can have many causes, including spinal, disc, joint or nerve involvement that is not muscular. Persistent, severe, unexplained or concerning symptoms should be assessed by an appropriate healthcare professional.
JSM Reset is an educational wellness and mobility app. It does not diagnose medical conditions and is not a substitute for professional medical advice, diagnosis, or treatment.
Muscles Commonly Involved in Lower Back Movement and Tension
The following muscles contribute to lower back movement and are often associated with tightness or restricted movement. Each card links to the relevant JSM Reset content where an approved self-resisted stretch exists.
Quadratus Lumborum
- Location
- Deep in the lower back, between the lowest rib and the top of the pelvis.
- Movements & Functions
- Helps side-bend the trunk and stabilizes the lower spine.
- How Tension May Feel
- May feel like a deep ache in the lower back or side of the waist, especially with prolonged sitting or standing.
Lumbar Erector Spinae
- Location
- Either side of the lower spine.
- Movements & Functions
- Helps extend the lower back and maintain upright posture.
- How Tension May Feel
- May feel like tightness or aching along the lower spine, especially after lifting or prolonged standing.
Iliopsoas
- Location
- Deep at the front of the hip, connecting the lower spine to the upper thigh.
- Movements & Functions
- Flexes the hip forward and helps stabilize the lower spine.
- How Tension May Feel
- May feel like tightness deep in the front of the hip or groin, sometimes contributing to lower back tension.
Thoracic Erector Spinae
- Location
- Either side of the spine in the upper and mid-back.
- Movements & Functions
- Helps extend the spine and maintain posture, working with the lumbar erector spinae.
- How Tension May Feel
- May feel like tightness along the mid-back, which can accompany lower back tension.
Where Do You Feel Lower Back Discomfort?
Discomfort can show up in different areas. Some common examples include:
- Lower spine area
- Side of the lower back (waist area)
- Lower back into the buttock
- Lower back with prolonged sitting
- Lower back with prolonged standing
- Pain when bending forward
Location alone does not identify a single muscle, which is why JSM Reset combines symptom location with movement questions to help narrow down the muscles that may be involved.
How JSM Reset Find My Pain Works
Tell us where you feel it
Point to the area on the 3D body where you feel discomfort or tension.
Answer questions about your symptoms and movement
Share details about the sensation, how long you have felt it, and what movements affect it.
See possible muscles highlighted on the 3D body
JSM Reset shows the muscles that may be involved based on your answers.
Explore appropriate JSM Reset self-resisted stretches
Open the recommended stretches for the muscles identified and follow the guided instructions.
JSM Reset does not provide a medical diagnosis. Recommendations are based on JSM Reset's therapist-created clinical movement framework and are intended for educational and self-care purposes.
What Is a Self-Resisted Stretch?
A JSM Reset self-resisted stretch combines a gentle muscular contraction with controlled movement or stretching. Your own body provides the resistance, so no special equipment is required.
Users should stay within comfortable ranges and stop if movement produces concerning symptoms.
Self-resisted stretching is an educational self-care technique. It is not a treatment or cure for any medical condition.
Try the Lower Back Reset
If you already know you want to work on lower back mobility, you can go directly to the Lower Back Reset program and explore the guided self-resisted stretches for the muscles above.
Not Sure Which Muscle?
Start with Find My Pain. Answer a few questions about where you feel discomfort and which movements affect it, and JSM Reset will show the muscles that may be involved on the 3D body.
JSM Reset is an educational wellness and mobility app. It is not a substitute for professional medical advice, diagnosis, or treatment. If you have persistent, severe, or concerning symptoms, please consult an appropriate healthcare professional.
Created and clinically directed by Cara Jenner
JSM Reset is an educational wellness resource based on the Jenner Structural Method™ and years of hands-on therapeutic experience.
For general education and wellness only. Not medical advice, diagnosis, or treatment.
© 2026 JSM Reset / Jenner Structural Method™. All rights reserved.