Running is one of the simplest forms of exercise—but for some people, it comes with an unexpected ache: pain in the sacrum. Physical therapists often hear runners describe soreness or sharp discomfort right at the base of their spine, between the hips. Let’s unpack why this happens and what it means for your body.
The Sacrum’s Role in Running
The sacrum is a triangular bone at the bottom of your spine that connects to your pelvis at the sacroiliac (SI) joints. It acts as a stability hub, transferring force between your legs and your trunk with every step. Running creates repetitive impact, and if the sacrum isn’t supported well, it can quickly become irritated.
Why the Sacrum Hurts During Running
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Sacroiliac Joint Dysfunction
If the SI joints are too stiff or too mobile, running forces can’t distribute evenly. This imbalance often leads to localized pain in the sacrum that may feel worse with impact or uneven terrain. -
Muscle Imbalances
Weak glutes or deep core muscles can leave the sacrum less supported. Meanwhile, tight hip flexors, hamstrings, or piriformis muscles may pull unevenly on the pelvis, creating asymmetry that stresses the sacrum. -
Pelvic Alignment Issues
Small shifts in how the pelvis tilts or rotates can change the way forces travel through the sacrum. Even subtle misalignment over thousands of running steps can cause soreness or pain. -
Training Errors
A sudden increase in mileage, hill running, or poor footwear can overload the pelvis and sacrum before your body adapts, leading to pain and irritation. -
Underlying Weakness or Instability
The sacrum relies on strong stabilizers, like the glutes, abdominals, and pelvic floor, to handle the repetitive pounding of running. If these muscles fatigue or aren’t trained properly, the sacrum takes on more stress than it should.
How Physical Therapy Addresses Sacral Pain in Runners
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Assessment of Running Mechanics: Looking at stride, hip stability, and pelvic movement patterns helps identify where stress is coming from.
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Strengthening: Targeting the glutes, core, and hip stabilizers builds a solid foundation to protect the sacrum.
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Mobility Work: Stretching tight hip flexors, hamstrings, and piriformis muscles reduces uneven pull on the pelvis.
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Manual Therapy: Hands-on treatment can restore balance in the SI joints and relieve soft tissue tension.
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Training Guidance: Adjusting mileage, surfaces, and footwear can keep the sacrum from being overloaded.
The Takeaway
If your sacrum hurts when you run, it’s often a sign of imbalance, either in your muscles, your pelvis, or your training habits. By restoring mobility, building strength, and fine-tuning your mechanics, physical therapy can help you run comfortably and keep your sacrum pain-free.
Looking to optimize your well being with pelvic floor physical therapy? Reach out to us at Pelvic Health Center in Madison, NJ to set up an evaluation and treatment! Feel free to call us at 908-443-9880 or email us at [email protected].