Overview
The lumbar spine is five vertebrae stacked on discs, linked by small facet joints at the back and held by ligaments and by layers of muscle. A sprain is a stretch injury of the ligaments; a strain is a tear in muscle or its tendon. The two usually occur together, are treated the same way, account for most acute low-back pain, and heal.
Treatment depends less on the injury itself than on excluding other causes. The visit confirms that the pain is mechanical and muscular, rules out a disc herniation pressing on a nerve, a fracture or a red-flag condition, and then gets you moving. Dr. O'Donnell manages back strains without surgery, and the protocol he uses is built around early activity and a graded core program rather than rest.
Common Symptoms
- Aching or sharp pain across the low back, often to one side, that started with a lift, a twist or a sudden movement
- Muscle spasm and a back that feels locked, with difficulty standing fully upright for the first day or two
- Pain worse with bending forward, prolonged sitting and getting out of a chair or car, easier with walking
- Stiffness first thing in the morning that loosens over 20 to 30 minutes
- Pain that may spread into the buttock but stops above the knee
Pain that shoots below the knee, with numbness or tingling in the foot, is sciatica from a disc herniation. Pain that has been coming and going for years without a clear injury, worse with sitting, is more typical of degenerative disc disease.
Causes & Risk Factors
The typical mechanism is a lift with the back bent and twisted: moving a suitcase out of a trunk, lifting a child, a deadlift with poor form, a golf swing, hauling a sail. A sudden awkward movement or a collision in sport does the same. Deconditioning is the underlying risk: weak abdominal and gluteal muscles, tight hamstrings and hip flexors, and long hours sitting leave the lumbar ligaments and muscles doing work the core should do. In younger patients they follow sport or lifting; after 40 they are more often layered on discs and facets that have begun to wear.
How It Is Diagnosed
Dr. O'Donnell watches how you stand, walk and bend, palpates the spine and paraspinal muscles for spasm and a tender level, and tests hip motion, because a stiff hip refers pain to the back. The neurological exam is the most important part of the visit: straight-leg raise and slump tests for nerve-root tension, knee and ankle reflexes, strength in the big toe, ankle and knee, and sensation in the foot. A strain leaves all of that normal. Any weakness, saddle numbness or a change in bladder or bowel control is treated as an emergency.
X-rays are not needed for a first strain with a normal neurological exam; they are taken after a significant fall, in patients over 50, or when pain has not improved in 6 weeks, and show alignment, fractures and disc-space narrowing. MRI is ordered only when there are nerve signs, when pain has failed 6 weeks of care, or when a red flag is present. Prior imaging can be uploaded through mymedicalimages.com.
Treatment Options
Non-operative care
Every back strain is treated without surgery, and the first instruction is to avoid bed rest. Walking as tolerated from day one, heat, a short course of an anti-inflammatory and, for severe spasm, a few days of a muscle relaxant get most patients moving within the week. Physical therapy starts in the first two weeks with directional-preference exercises and transverse abdominis activation, then builds a core stabilization program (bird-dog, bridges, planks), stretches the hips and hamstrings, strengthens the glutes and adds aerobic conditioning. The last phase is lifting mechanics and body-mechanics education, which is what stops the next episode. Heavy lifting and repeated bending and twisting are avoided in the first two weeks, not for months.
When a spine surgeon is involved
A strain does not need a spine surgeon. Dr. O'Donnell refers when the picture turns out to be something else: progressive leg weakness, cauda equina symptoms (saddle numbness, bladder or bowel change), or leg-dominant pain from a disc herniation that has failed 6 to 12 weeks of care.
Recovery & What to Expect
Most strains are substantially better in 2 weeks and resolved in 6. The phases below are from Dr. O'Donnell's nonoperative lumbar protocol.
| Phase | Timing | What happens |
|---|---|---|
| Pain control & movement | Weeks 0–2 | Walking as tolerated; gentle range of motion and directional-preference exercises; core activation; heat or other modalities; no heavy lifting, prolonged sitting or repeated bending |
| Stabilization | Weeks 2–6 | Core stabilization progression (bird-dog, bridges, planks); hip, hamstring and hip-flexor flexibility; glute strengthening; walking or bike for conditioning |
| Return to activity | Weeks 6–12 | Progressive strengthening; lifting mechanics and body-mechanics education; return to full work and sport once function is painless and lifting form is good |
Desk work continues from the start with breaks every 30 minutes; driving resumes within days once you can turn to check mirrors; running and gym work return around weeks 3 to 6 and contact or lifting sports at 6 to 12 weeks. The full protocol is available as a PDF: lumbar sprain nonoperative management.
Frequently Asked Questions
Should I rest in bed for a pulled back muscle?
No. More than a day or two of bed rest stiffens the back, weakens the core and prolongs recovery. Walk as much as you comfortably can from the first day, use heat and a short course of an anti-inflammatory, and avoid heavy lifting and repeated bending for the first two weeks. Movement is the treatment.
How long does a low back strain take to heal?
Most patients are substantially better in 2 weeks and back to full activity by 6, with core work continuing to 12 weeks to prevent a recurrence. Pain that has not improved at all after 2 weeks, or that runs below the knee, needs a re-examination for a disc or nerve problem.
Do I need an MRI for low back pain?
Not for a typical strain with a normal neurological exam; MRI finds disc bulges in most pain-free adults and does not change the treatment. It is ordered when there is leg weakness or numbness, when pain has failed 6 weeks of proper care, or when a red flag such as fever, cancer history or bladder change is present.
When is back pain an emergency?
Numbness in the groin or inner thighs, new difficulty controlling bladder or bowel, or weakness in a leg that is getting worse are signs of nerve compression that need same-day evaluation, not an appointment next week. Back pain with fever, after major trauma, or in someone with a cancer history also needs prompt assessment.
How do I keep from hurting my back again?
Finish the program. The strain heals in weeks; the weak core and stiff hips that let it happen take 12 weeks of stabilization work to correct. Keep the bird-dog, bridge and plank routine as maintenance, break up sitting every 30 minutes, and lift with the load close to the body and bend at the hips rather than the back.
This page is for general education and is not a substitute for a medical evaluation. Treatment recommendations depend on your individual diagnosis and goals. Kevin O'Donnell, MD sees patients from Coral Gables, Miami, Brickell, Pinecrest and Coconut Grove at 475 Biltmore Way, and out-of-town patients by telemedicine.