The Real Reason You Feel Taller After an Adjustment
You stand up after an adjustment and something feels different.
Your back moves more easily.
You feel less guarded.
You catch yourself standing a little more upright.
Maybe you even think:
“Did I just get taller?”
Probably not in any permanent sense.
But the sensation is not necessarily imaginary either.
Your height naturally changes throughout the day, and one small randomized trial has actually measured an immediate increase in stature after a particular spinal manipulation.
That does not mean chiropractic care can increase your adult height.
It does mean the familiar “I feel taller” comment has a more interesting explanation than simply dismissing it.
Adults Are Not Exactly The Same Height All Day
Measure yourself carefully after waking and again later in the day and you may get different numbers.
The main reason is the spine.
Intervertebral discs contain substantial water and respond to mechanical loading. During normal upright activity, disc dimensions change and overall stature decreases slightly. During unloading and sleep, some of that change reverses. (PubMed)
One study of 34 adults measured average daytime height losses of 6.9 mm in men and 7.4 mm in women across approximately seven hours. (PubMed)
Another longitudinal observation recorded an average daily change of about 1.4 cm in one adult. (PubMed)
So the commonly repeated idea that adults can vary by around a centimetre across a day is plausible.
But the amount differs between individuals.
Your Bones Are Not Shrinking Every Afternoon
It is more accurate to talk about changes in disc and soft-tissue dimensions than vertebrae being crushed by gravity.
MRI research has shown that lumbar disc height and volume decrease after prolonged upright loading. (PubMed)
That process is normal.
Walking, standing, sitting, and carrying things all place load through the spine.
Overnight, unloading allows fluid redistribution.
A daily height change is therefore not evidence that gravity is damaging your spine and not evidence that you need an adjustment to restore what was lost.
Can One Adjustment Change Your Measured Height?
There is some evidence that it can, at least immediately and in a very specific population.
A 2014 randomized, double-blind controlled trial included 40 men with L5-S1 degenerative disc disease and low back pain.
Half received one lumbosacral high-velocity, low-amplitude manipulation.
Half received a placebo intervention.
Immediately afterward, the manipulation group demonstrated statistically significant improvements in:
- Measured full height
- Self-reported low back pain
- Spinal flexion mobility
- Hip flexion during a straight-leg-raise test
compared with controls. (PubMed)
That is probably the best direct evidence supporting the idea behind this article.
It also needs to be interpreted carefully.
What The Study Did Not Show
The trial did not demonstrate that:
- Chiropractic care permanently makes adults taller
- Every adjustment increases height
- Women experience the same effect
- Computerized adjusting produces the same effect
- Multiple treatments progressively add height
- Degenerative discs were regenerated
- Vertebral bones moved permanently farther apart
- Improved height persisted long term
The researchers only examined the immediate response after one specific lumbosacral manipulation in 40 men. They explicitly recommended future research involving women and longer-term outcomes. (PubMed)
So the study is interesting.
It is not a chiropractic height-growth study.
Why Might Height Change Immediately?
The trial cannot tell us exactly which mechanism produced the stature change.
Several factors may be relevant.
Pain decreased.
Spinal movement increased.
The treatment mechanically loaded the lumbosacral region.
The participants may also have stood differently after treatment.
A person’s measured height can change slightly with posture, spinal loading, and disc dimensions.
It would therefore be too strong to claim that the manipulation proved the vertebrae had been permanently separated.
A more accurate conclusion is:
A specific spinal manipulation produced a small immediate measurable change in stature alongside other short-term musculoskeletal changes.
Feeling Taller And Being Taller Are Different Outcomes
Suppose you arrive with back pain and stand in a somewhat guarded position.
After treatment, standing upright feels easier.
You may suddenly feel “longer” through the torso.
That subjective experience could be much larger than any measurable change on a stadiometer.
That is fine.
Pain changes how people move.
When pain decreases, movement behaviour can change quickly.
The clinical outcome that matters is not whether your height increased by a few millimetres.
It is whether you can move and function more comfortably.
The Astronaut Comparison Is Real, But Misleading
Astronauts genuinely become taller in space.
NASA reports that crewmembers can increase their stature by as much as approximately 3% while exposed to microgravity. (NASA)
Research attributes this to spinal elongation in the absence of normal gravitational compression, including straightening of spinal curves and changes in intervertebral discs and body fluids. (NASA Technical Reports Server)
NASA also notes that astronauts return toward their previous height once they return to Earth’s gravity. (NASA)
But an astronaut floating in microgravity for months is not experiencing the same thing as a patient receiving a brief spinal adjustment.
Microgravity continuously changes the loading environment.
An adjustment applies a brief mechanical input.
The NASA finding supports the principle that spinal loading affects stature.
It does not validate the claim that chiropractic manipulation reproduces microgravity.
Do Adjustments Decompress Your Discs?
This depends on what “decompress” means.
A spinal manipulation certainly changes mechanical forces in the area being treated.
Laboratory research has demonstrated temporary intradiscal pressure changes during particular manipulation techniques. A 2024 in-vitro cervical study, for example, found reductions in intradiscal pressure during rotation-traction manipulation. (PubMed)
That does not establish that an ordinary chiropractic adjustment:
- Permanently widens a disc space
- Produces sustained negative pressure
- Pulls a herniated disc back into place
- Rehydrates a degenerated disc
- Restores normal disc structure
Biomechanical effects during a treatment and long-term tissue changes are different questions.
What Does “Negative Pressure” Actually Refer To?
Negative intradiscal pressure has been directly measured during some traction-based decompression procedures.
A classic study measured pressure inside lumbar discs while patients were treated on a vertebral axial decompression table. Greater traction forces reduced intradiscal pressure, with pressure reaching negative values at higher tensions. (PubMed)
That is a finding about sustained mechanical traction.
It should not simply be copied into an explanation of manual or computerized chiropractic adjusting.
Different treatments apply different forces for different lengths of time.
They need evidence specific to the intervention being discussed.
Computerized Adjusting Is Not A Height-Enhancement Technology
Lakeview Chiropractic & Acupuncture Wellness Centre offers a computerized chiropractic adjusting option.
The clinic describes the device as using controlled mechanical pulses without the twisting or cracking movements associated with some manual techniques. (Lakeview Chiropractic & Acupuncture)
That may appeal to a patient who prefers a lower-force treatment experience.
But there is no good evidence that computerized adjusting makes patients taller, restores adult height, or reproduces the stature result seen in the 2014 manual-manipulation trial.
Those claims should not be inferred merely because both procedures fall under chiropractic care.
What Happens To Your Discs During A Normal Day?
Disc fluid behaviour is frequently misunderstood.
Intervertebral discs are hydrated tissues.
When subjected to prolonged loading, fluid can shift out of the tissue and disc height can decrease.
When loading is reduced, fluid can return.
An in-vivo MRI study found significant reductions in lumbar disc dimensions after several hours of upright activity. (PubMed)
Another study linked MRI-measured changes in lumbar dimensions with measurable stature loss after a loading task. (PubMed)
This is a normal load-response cycle.
The discs are not simply “deflating” in a pathological sense every day.
Do Chiropractic Adjustments Rehydrate Discs?
There is not sufficient evidence to make that clinical claim.
The fact that discs contain water does not prove that an intervention rehydrates them.
Likewise, an immediate increase in standing height does not demonstrate increased disc health.
A 2024 case report used magnetic resonance spectroscopy to investigate biochemical changes in one patient after spinal manipulation, but isolated case evidence cannot establish disc regeneration as an expected chiropractic outcome. (PubMed)
When chiropractic care is used for back pain, progress should be measured by outcomes such as pain, disability, movement, and activity.
Not an assumed change in disc hydration.
Does Slouching Make You Permanently Shorter?
Not in the way commonly implied.
If you stand in a flexed or slumped position, your vertical height at that moment is lower.
Straighten your trunk and your measured height can increase.
That does not mean slouching shortened your bones.
Likewise, years of computer work do not necessarily “stunt” an adult’s natural height.
There are medical reasons adults can lose height over time, including vertebral compression fractures, osteoporosis, and substantial structural spinal changes.
Ordinary day-to-day posture should not be placed in the same category.
Is There One Correct Spinal Curvature?
No.
Normal spinal curves vary between individuals.
The objective of musculoskeletal care should not automatically be to make everyone’s X-ray or posture look identical.
A person can stand differently because of:
- Anatomy
- Pain
- Habit
- Vision
- Fatigue
- Work demands
- Sport
- Comfort
Treatment may help someone move more comfortably or tolerate upright activity better.
That is clinically meaningful without claiming a perfectly restored curvature.
Why “Standing Straighter” Can Still Be A Useful Outcome
Rejecting exaggerated posture claims does not mean posture is irrelevant.
If someone cannot comfortably stand upright because their back hurts, improvement matters.
Maybe they can:
- Stand longer
- Walk farther
- Move through a larger comfortable range
- Return to exercise
- Work with less discomfort
Those are meaningful functional changes.
The problem occurs when those improvements are turned into claims that the spine has been permanently realigned or that every nerve is now working better.
Does Better Alignment Improve Nerve Function?
This is another common leap.
Spinal nerve roots can genuinely become irritated or compressed by conditions such as disc herniation or spinal stenosis.
Those conditions may produce:
- Radiating pain
- Tingling
- Numbness
- Weakness
- Reflex changes
That is neurological disease.
It is different from saying an asymptomatic vertebral “misalignment” interferes with generalized nerve flow to the body.
Chiropractic care should be connected to the specific musculoskeletal or neurological presentation being treated.
What Are The Realistic Benefits Of Spinal Manipulation?
Spinal manipulation is one conservative treatment option for selected musculoskeletal conditions.
WHO’s guideline for chronic primary low back pain states that spinal manipulative therapy may be offered as part of care, although the recommendation is conditional and the certainty of evidence is very low. (Iris)
That supports cautious claims involving:
- Pain
- Function
- Mobility
- Return to activity
It does not support claims involving:
- Permanent height gain
- Universal posture correction
- Improved digestion
- Better breathing through nerve flow
- Whole-body nervous-system optimization
The treatment goal should match the evidence.
Is Height A Good Measure Of Chiropractic Progress?
Usually not.
If your treatment began because you had low back pain, progress should probably be measured using things related to low back pain.
For example:
- Pain intensity
- Disability
- Walking tolerance
- Work ability
- Strength
- Range of motion when relevant
- Return to exercise
- Frequency and severity of flare-ups
Feeling taller can be an interesting side observation.
It should not become the clinical target.
How Lakeview Chiropractic & Acupuncture Wellness Centre Approaches Spinal Care
Lakeview Chiropractic & Acupuncture Wellness Centre offers both traditional manual chiropractic care and computerized adjusting. (Lakeview Chiropractic & Acupuncture)
Dr. David Drazic’s computerized option uses controlled mechanical pulses and can be used when a patient prefers an approach without the twisting or cracking movements involved in some manual techniques. (Lakeview Chiropractic & Acupuncture)
The clinic also incorporates exercise and mobility guidance for selected musculoskeletal complaints. (Lakeview Chiropractic & Acupuncture)
For someone who says they feel “compressed,” the useful assessment is not simply a measurement of height.
Dr. David Drazic can evaluate whether the person actually has:
- Back pain
- Restricted or painful movement
- A neurological pattern
- Reduced physical capacity
- A relevant musculoskeletal condition
Treatment can then be selected according to those findings and the patient’s preferences.
The objective is helping the person function better.
Not adding centimetres to their height.
Frequently Asked Questions About Feeling Taller After Chiropractic Care
Can You Really Gain Height After An Adjustment?
A 2014 randomized trial found an immediate increase in measured stature after one specific lumbosacral manipulation in men with L5-S1 degenerative disc disease. It did not demonstrate permanent height gain or establish that the effect occurs after all chiropractic treatments. (PubMed)
Why Does My Height Decrease During The Day?
Normal upright activity loads the intervertebral discs. Their dimensions and fluid content change, contributing to a small daily reduction in stature that generally recovers during unloading and sleep. (PubMed)
How Much Shorter Are You At Night?
It varies. One study found average daytime losses of roughly 7 mm among adults over about seven hours. Other research has documented larger changes in some individuals. (PubMed)
Do Astronauts Get Taller?
Yes. NASA reports that astronauts can gain up to approximately 3% in stature during microgravity exposure. Their height returns toward normal after returning to Earth. (NASA)
Does An Adjustment Work Like Microgravity?
No. Microgravity continuously removes normal gravitational loading. An adjustment is a brief mechanical treatment.
Do Adjustments Create Negative Pressure In Discs?
Pressure changes can occur during specific manipulation techniques, but sustained negative intradiscal pressure is better documented during certain traction procedures. Routine adjustments should not generally be described as creating lasting negative disc pressure. (PubMed)
Can Computerized Chiropractic Adjusting Make Me Taller?
There is not good evidence that computerized adjusting increases adult height. Its relevant difference is the way the mechanical treatment is delivered, using controlled pulses without some of the movements used in manual manipulation. (Lakeview Chiropractic & Acupuncture)
Does Poor Posture Permanently Reduce Height?
Ordinary posture changes how tall you appear or measure in the moment. It does not normally shorten adult bones.
Can Chiropractic Care Improve Posture?
Selected musculoskeletal care and exercise may improve comfort, movement, and functional positioning. There is no need to promise permanent correction to one ideal spinal alignment.
What Should I Measure Instead Of Height?
Pain, movement, strength, function, activity tolerance, work ability, and progress toward the reason you sought care are usually more meaningful.
Feeling Taller Is A Sensation, Not The Treatment Goal
There is a legitimate science story here.
Your height varies throughout the day.
Intervertebral discs respond to loading.
Astronauts become taller in microgravity.
And a small randomized trial found an immediate measurable height change after one form of spinal manipulation.
But those facts do not show that chiropractic care permanently lengthens an adult spine.
They do not show that every adjustment creates negative pressure.
And they do not show that treatment restores a person’s “full height potential.”
If you feel taller after an adjustment, the more useful question is whether you also feel and function better.
If back or neck symptoms are making standing, walking, work, or exercise difficult, Lakeview Chiropractic & Acupuncture Wellness Centre can assess the musculoskeletal problem and determine whether manual chiropractic care, computerized adjusting, exercise guidance, another conservative option, further investigation, or referral is appropriate.
Medical Disclaimer
This article is for educational purposes only and does not replace individualized medical or chiropractic assessment. Adult height can change temporarily because of normal spinal loading and measurement posture and can decline over time because of aging, osteoporosis, vertebral compression fractures, spinal deformity, and other conditions. Unexpected or substantial height loss, pain following significant trauma, progressive neurological symptoms, or other concerning changes warrant appropriate medical evaluation.
Sources And Clinical References
Archives Of Physical Medicine And Rehabilitation: Short-Term Effect Of Spinal Manipulation On Pain Perception, Spinal Mobility, And Full Height Recovery. Randomized controlled trial in 40 men finding an immediate increase in measured stature, pain improvement, and mobility following one L5-S1 manipulation, without evidence of permanent height increase. (PubMed)
Spine: In Vivo Diurnal Variation In Intervertebral Disc Volume And Morphology. Supports normal changes in lumbar disc dimensions during upright loading and the contribution of disc-height changes to normal daytime stature loss. (PubMed)
Homo: Factors Influencing Diurnal Variation In Height Among Adults. Supports measurable daytime adult stature loss averaging approximately 7 mm during the study interval. (PubMed)
Archives Of Physical Medicine And Rehabilitation: Intervertebral Disc Dimensions After A Loading Task. Supports correlations between MRI-measured lumbar dimensional changes and short-term stature loss after spinal loading. (PubMed)
NASA: Risk Of Spaceflight-Induced Bone Changes. Supports spinal elongation and increases of up to approximately 3% in astronaut stature during microgravity exposure. (NASA)
NASA: The Effects Of Microgravity On Seated Height. Supports spinal straightening, fluid shifts, disc changes, and stature increases occurring during sustained microgravity exposure. (NASA Technical Reports Server)
Journal Of Neurosurgery: Effects Of Vertebral Axial Decompression On Intradiscal Pressure. Demonstrates negative lumbar intradiscal pressures during a specific traction-based decompression procedure, helping distinguish sustained traction from ordinary chiropractic adjustment. (PubMed)
Rotation-Traction Manipulation And Cervical Intradiscal Pressure. Laboratory study supporting transient intradiscal-pressure changes during a particular cervical manipulation technique without establishing permanent clinical decompression. (PubMed)
World Health Organization: Guideline For Non-Surgical Management Of Chronic Primary Low Back Pain. Supports spinal manipulation as one possible component of care under a conditional recommendation based on very low-certainty evidence. (Iris)