Lower back pain is one of the most common physical complaints, especially for people who sit a lot, train hard, or feel constantly tight through the hips. While many people assume the pain comes directly from the spine, the real cause is often tight hip flexors — particularly the psoas muscle.
What Is the Psoas?
The psoas is a deep muscle that connects the lower spine to the top of the thigh. It plays a key role in posture, walking, running, and stabilising the spine. Because it attaches directly to the lumbar vertebrae, tension in the psoas can pull on the lower back.
How Tight Hips Cause Lower Back Pain
Long periods of sitting, cycling, running, or heavy lifting can shorten the hip flexors. When the psoas and surrounding hip muscles become tight:
- The pelvis is pulled into an anterior tilt
- The lower back arches excessively
- Spinal compression increases
- Core muscles struggle to engage properly
This often leads to persistent lower back tightness, stiffness, or pain.
Signs Your Psoas May Be Involved
- Lower back pain that improves with movement
- Tight hips or groin discomfort
- Difficulty standing fully upright
- Pain after long periods of sitting
- Weak or inhibited core muscles
What Helps Relieve the Pain
Addressing lower back pain linked to tight hips requires more than stretching alone:
- Targeted hip flexor and psoas release
- Strengthening the glutes and deep core
- Improving posture and sitting habits
- Gradual mobility work for the hips and spine
The Takeaway
Lower back pain isn’t always a back problem. Tight hips and an overworked psoas can quietly place strain on the spine over time. Restoring balance between mobility and strength in the hips and core can reduce pain, improve movement, and help prevent future flare-ups.
