Also called: Spondylolisthesis; degenerative or isthmic spondylolisthesis; a vertebra that has shifted forward
Exercise strongly helps
Strength
Stretch
One vertebra has slid forward on the one below - either through a stress fracture that healed in youth, or through worn discs and joints later in life. The segment is less stable, so standing and walking ache, and the nerves can be pinched.
How common: Wear-related slips in about 8% of women and 3% of men over 50; the younger, stress-fracture type in 4-11% of adults, most of them never knowing
What it is
Spondylolisthesis comes in two main forms. The isthmic type follows a stress fracture in the bony bridge of the vertebra, usually sustained in adolescence during repeated hyperextension - gymnastics, cricket bowling, diving. The degenerative type happens later in life when worn discs and facet joints allow the segment to shift, and it is more common in women over fifty.
The slip itself matters less than people fear. Many are found incidentally and cause nothing. What produces symptoms is the segment being less able to control load, so it shears under extension, and in some cases the narrowing that follows compresses nerves - producing the leg symptoms of spinal stenosis.
What it feels like
- Aching low back pain that builds with standing and walking
- Relief on sitting or bending forward
- A sense of the back giving way or needing to be supported
- Sometimes tight hamstrings that never seem to change, which is a recognised association
- Leg pain, heaviness or pins and needles where the nerves are involved
What causes it
Most people have more than one of these at once, and they feed each other. Read the
list looking for the two or three that sound like your week rather than for the one
true answer — the ones that describe you are the ones worth acting on.
- A healed adolescent stress fracture
- Repeated hyperextension during growth can fracture the pars interarticularis, the bony bridge that locks a vertebra to the one below. Once broken on both sides, the vertebra can slide forward. Gymnastics, cricket fast bowling, diving and throwing sports are the classic settings.
- Degenerative disc and facet change
- In later life, disc height loss and facet joint wear allow the segment to shift forward. This type is most common at the fourth lumbar level and is several times more common in women.
- Reduced segmental control
- The segment relies more on muscular control once the passive restraint is compromised. Weak deep trunk muscles mean it shears further under load, which is where most of the pain comes from.
- Extension loading
- Standing, walking and arching all increase the shear at the slipped segment. This is why symptoms are positional and why flexion-based activity is usually comfortable.
- Sports involving repeated extension
- Beyond the original fracture, continuing hyperextension activity loads the segment repeatedly. It matters for adolescents in particular, where the fracture may still be healing.
- Hormonal and structural factors
- The degenerative type's strong female predominance suggests hormonal and pelvic geometry factors, particularly after menopause.
- Weak glutes and tight hip flexors
- Both increase the lumbar arch and therefore the shear at the segment. They are among the most modifiable contributors.
- Genetics
- Isthmic spondylolisthesis is more common in some populations and clusters in families, suggesting an inherited susceptibility of the bony bridge.
- Being frightened by the word slipped
- The name implies instability and imminent catastrophe. Most slips are stable and progression is uncommon in adults, but the fear reliably produces avoidance and deconditioning.
Who tends to get it
- Adolescents in extension-heavy sports - gymnastics, cricket bowling, diving, throwing
- Women over fifty, for the degenerative type
- Anyone with a known pars fracture from youth
- People with a long-standing arched lower back posture
- Anyone with hamstring tightness that has never responded to stretching, which is an associated finding
What makes it worse, and what settles it
Makes it worse
- Extension-based exercise and heavy arching
- Prolonged standing and walking without breaks
- Heavy overhead lifting with an arched back
- Fear-driven avoidance, which weakens the muscles the segment depends on
- Continuing extension sport in an adolescent with an acute pars stress fracture, which prevents healing
Settles it
- Deep trunk and abdominal strengthening, which gives the segment the muscular control it has lost
- Glute strengthening and hip flexor stretching, which reduce the lumbar arch and the shear
- Flexion-biased exercise where extension is the aggravator
- Building walking tolerance in intervals
- Understanding that most slips are stable, which is what allows the strengthening to happen
What actually helps
The short version: One vertebra has slid forward on the one below, either through a healed stress fracture from youth or through worn discs and facet joints later in life. The segment is less stable, so the back extends and shears there under load, standing and walking ache, and the nerves can be pinched with the leg symptoms of spinal stenosis
Strength work: Abs: Transverse Abdominis; Back: Multifidus; Core - endurance holds in a neutral or slightly flexed spine; Abs: Obliques; Glutes: Max; Glutes: Med; Legs: Hamstrings; Legs: Quads - hip hinge and squat patterns so the hips, not the slip, do the bending
Stretching: Hips: Flexors - a tight hip flexor pulls the lumbar spine into extension; Legs: Hamstrings gently; Glutes; Hips: Piriformis; Back: Lower Back - knee-to-chest type flexion is usually the relieving direction
Massage: Back: Quadratus Lumborum (QL); Glutes; Hips: Psoas; Legs: Hamstrings
Also worth doing: Avoid repeated end-range back arching - the yoga cobra, heavy overhead pressing, and swimming butterfly; sit and stand with a slight forward tilt if that relieves it; walking with a slightly forward lean, or cycling, keeps you active without the extension
What the evidence says: Conservative care is first-line for most spondylolisthesis, with flexion-biased trunk stabilization and hip strengthening the standard physiotherapy approach; a classic randomized trial in spondylolysis and spondylolisthesis found specific deep-abdominal and multifidus training cut pain and disability more than general exercise, with the benefit holding at 30 months.
The names above are the Targets qFIT tracks —
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Ready-made routineBack Pain/Bulletproofing
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Get it checked if…
Bladder or bowel change, saddle numbness, progressive leg weakness, or a slip in a teenager with worsening back pain and tight hamstrings - specialist review; leg pain on walking that eases on sitting is stenosis and needs assessing too
And whatever the body part: chest pain or unusual breathlessness on
exertion; a fever alongside the pain; unexplained weight loss; pain that is constant and
unrelated to how you move; new numbness, weakness or loss of bladder or bowel control; or
one calf that is swollen, warm and painful. Any of those, stop and get assessed.
How it usually goes
Most adults with spondylolisthesis do well with strengthening and load management, and progression of the slip in adulthood is uncommon. Symptoms usually improve over three to six months of consistent trunk and hip work. Adolescents with an acute pars stress fracture need it identified and rested properly, since a fracture that heals is a very different long-term situation from one that does not. Progressive leg weakness, numbness in the saddle area or bladder or bowel changes is an emergency.
Prevalence basis: StatPearls spondylolisthesis; lumbar degenerative spondylolisthesis epidemiology systematic review
Others the same routine covers
These share the Back Pain/Bulletproofing routine, so the work is the same. If one of them also
sounds like you, that is a reason to expect more from it, not less.
This is general information, not a diagnosis, and it cannot examine you.
If it matches you, use it to ask better questions of a clinician rather than to replace one.