What is low back pain?
Low back pain is the world's most common musculoskeletal complaint. For the large majority of people it has no single structural cause: no disc "slipping", no vertebra out of place. It's better understood as a back that has become guarded and sensitised, often after a spike in load it wasn't ready for.
If pain runs down one leg in a distinct band rather than sitting mostly in the back, that's a different pattern worth reading up on specifically: nerve-related leg pain such as sciatica needs its own approach.
What causes it?
The primary mechanism
Most low back pain follows a mismatch between load and capacity: a training spike, a house move, a long stretch of poor sleep and high stress, or simply deconditioning after a sedentary patch. The back isn't damaged so much as it is under-prepared for what was asked of it.
Common contributing factors
- A sudden increase in activity or lifting load
- Deconditioned trunk, glute and hip muscles
- Poor sleep and high stress, which lower pain tolerance
- Prolonged sitting without movement breaks
Spines are built to bend. Rigid movement avoidance keeps backs sensitive; graded exposure to bending and lifting is part of most successful rehab, not something to fear indefinitely.
What the evidence says
Guidance from NICE backs group or individual exercise therapy as first-line treatment for non-specific low back pain. Trials comparing walking, strength training, Pilates-style and yoga-style programmes consistently find they all beat doing nothing, with no clear winner between them. Consistency, not the specific exercise chosen, is the active ingredient.
Red flags that mean assessment before exercise, rather than self-management: saddle numbness, a change in bladder or bowel control, or progressive leg weakness. Everything else responds well to the staged approach below.
Recovery protocol
Stage 1: calm and move (days 1–14)
- Knee rocks: lying on your back, knees bent, rock gently side to side for 60 seconds.
- Knees to chest: one at a time, a gentle hug held for 5 breaths, 3 rounds.
- Cat–cow: on all fours, slowly alternate rounding and arching, 10 unhurried cycles.
- Pelvic tilts: flatten and release the low back against the floor, 15 reps.
- Walking: the most underrated back exercise there is; short and frequent, building daily.
Stage 2: foundation strength (weeks 2–6)
- Glute bridge: 3 × 12. Strong glutes take pressure off the back throughout the day.
- Bird-dog: opposite arm and leg from all fours, slow and controlled, 3 × 8 per side.
- Side plank (knees bent to start): 3 × 15–30 seconds per side.
- McGill curl-up: hands under the low back, one knee bent, a small head-and-shoulder lift, 3 × 8.
Stage 3: real-world capacity (week 4 onward)
| Movement | Dose | Why it matters |
|---|---|---|
| Hip hinge with a stick along the spine | 3 × 10 | Grooves the bend-at-the-hips pattern |
| Sit-to-stand → goblet squat | 3 × 8–12 | Adds load gradually to a functional pattern |
| Deadlift pattern, light kettlebell | 3 × 8 | Lifting practice is protection that avoidance can't give you |
| Loaded carries | 3 × 30–40 m | Trunk endurance under real load |
Pain 0–3/10 during exercise that settles afterwards: green, continue. 4–6/10, or slow to settle: amber, trim the range or the load. Sharp leg pain or worsening symptoms the next day: red, regress and reassess. Flare-ups are chapters, not verdicts; almost every back flares at least once during rehab, and dropping back a stage for a few days then continuing is normal, not a failure.
Common misconceptions
- "Sit-ups will fix my back." Endless crunches load the spine without training the muscles that actually protect it. Modern core training is about stability and endurance, not repetition count.
- "I must keep my spine straight at all times." Rigid avoidance of bending keeps backs sensitive for longer than graded exposure does.
- "Exercise didn't work for me before." Most attempts that "fail" turn out to be two weeks of unloaded stretching followed by giving up. The trials that show exercise works are built on 8+ weeks and progressive strength stages, not a fortnight of gentle movement.
When to seek professional help
Most low back pain settles with the staged approach above. An in-person assessment is worth arranging if pain hasn't started improving after 4–6 weeks of consistent exercise, if it radiates down one leg in a clear band, or if there's any numbness, weakness, or change in bladder or bowel control.
- See a physio if: progress has stalled past 6 weeks, or you're unsure which stage suits your current irritability.
- Seek urgent care if: saddle numbness, bladder or bowel changes, or progressive leg weakness develop.