Why it might be more than your back
Low back pain is one of the most common reasons women seek medical care. Many people assume the problem starts in the spine, muscles, or joints. However, research shows that another part of the body may also play an important role—the pelvic floor.
The pelvic floor is a group of muscles that supports the bladder, uterus, and bowel. These muscles also work closely with the deep abdominal muscles, diaphragm, and back muscles to stabilize the spine during movement. When the pelvic floor is not functioning properly, it can contribute to pain, weakness, and poor movement patterns throughout the lower back and pelvis.
Research Shows a Strong Connection
Researchers have discovered a strong correlation between low back pain and pelvic floor dysfunction.
One study found that 95% of women with lumbopelvic pain had at least one type of pelvic floor dysfunction. The most common findings included:
- Pelvic floor muscle tenderness – muscle overactivity or spasm (71%)
- Pelvic floor muscle weakness (66%)
- Pelvic organ prolapse (41%)
Women who experienced both low back pain and pelvic girdle pain tended to have greater disability and more severe pelvic floor problems than those with back pain alone.
Why Are the Back and Pelvic Floor Connected?
Several factors help explain why these conditions often occur together.
Shared Core Stability
Many people think of the “core” as the abdominal muscles. In reality, the core includes four major muscle groups:
- The diaphragm
- The abdominal muscles
- The multifidus muscles in the back
- The pelvic floor
These muscles work together to stabilize the spine before movement occurs. If one component is not functioning well, the others often compensate. Pelvic floor weakness, overacticity or poor coordination may reduce the body’s ability to stabilize the lumbar spine, potentially increasing stress on the back.
Sacroiliac Joint Support
The pelvic floor also helps stabilize the pelvis and sacroiliac (SI) joints.
Research has shown that coordination between abdominal, spinal and the pelvic floor muscles can improve stability around the sacrum and pelvis. When these muscles are tight, weak or uncoordinated, the pelvis may become less stable during walking, lifting, and other daily activities. Eventually the joints become painful becuase of the lack of stability and larger muscles develop trigger points and pain because of the increased demand on them.
Shared Nerves
The pelvis contains a complex network of nerves that serve the bladder, bowel, reproductive organs, pelvic floor muscles, hips, and lower back.
Because these structures share nerve pathways, irritation in one area can influence another. This phenomenon, called viscerosomatic convergence, helps explain why someone with pelvic floor dysfunction may experience low back pain—and why chronic back pain may also affect bladder or pelvic floor function. Similar to your home, when one person is irritable or upset, it tends to create tension across everyone in the home.
Central Sensitization
For some women, the nervous system itself becomes more sensitive over time.
When pain persists, the brain and spinal cord can begin amplifying pain signals, a process known as central sensitization. Women with low back pain who also experience strong urinary urgency and signs of central sensitization are two to three times more likely to have painful pelvic floor muscles. When pain persists, the brain becomes the primary driver for how we perceive pain.
Common Symptoms That May Suggest Pelvic Floor Involvement
If you have low back pain along with any of the following symptoms, your pelvic floor may deserve further evaluation:
- Urinary leakage
- Strong urinary urgency
- Frequent urination
- Pelvic pressure
- Pelvic organ prolapse
- Pain with intercourse
- Constipation
- Tailbone pain
- Hip pain
- Pain that does not improve with traditional back treatment
These symptoms often occur together and may share common underlying movement and muscle coordination problems.
Can Pelvic Floor Physical Therapy Help?
Research suggests that pelvic floor physical therapy helps reduce pain in some women with low back pain, particularly during pregnancy and post partum. Several studies have also shown benefits for women with chronic low back pain.
Most women with back pain would benefit from a comprehensive evaluation that looks beyond the spine alone. Low back pain is rarely caused by just one structure.
A pelvic floor physical therapist evaluates how the muscles of the abdomen, diaphragm, back, hips, and pelvic floor work together during breathing, lifting, walking, and everyday activities. Addressing muscle coordination, movement patterns, and pelvic floor function to reduce pain and improve long-term function.
If your back pain has persisted despite traditional treatment—or if it occurs alongside bladder, bowel, or pelvic symptoms—it may be time to consider whether your pelvic floor is contributing to the problem.
