What actually happens in a chiropractic adjustment?

Short answer: A chiropractic adjustment is a quick, controlled movement your chiropractor applies by hand to a specific joint that isn't moving well. It takes a fraction of a second, often makes a pop, and aims to restore movement and ease pain. It's chosen after a proper check, and you can say no at any point.

What is a chiropractic adjustment?

"Chiropractic adjustment" is the everyday name for spinal manipulation. The technical description is a high-velocity, low-amplitude thrust: a fast movement over a very short distance. Your chiropractor takes a joint to the end of its comfortable range, then adds a small, quick push just beyond it. The joint moves a few millimetres. It isn't forced, twisted hard or "put back into place".

Adjustments can be used on the spine (neck, mid back, low back), the pelvis and sacroiliac joints, and other joints such as the hips, shoulders and feet. Chiropractors also use slower, gentler movements called mobilisation, soft tissue work, and table-assisted techniques. At our clinic, for example, we use a flexion-distraction table, a gentle, rhythmic technique for low back and disc problems.

A chiropractic adjustment, step by step

1. The check comes first. Your chiropractor looks at your history, how you move, which joints are stiff or tender, and orthopaedic and neurological tests. That's how they decide which joint, if any, to adjust. More on that in how chiropractors know where to adjust.
2. They explain and ask. You should know what's about to happen and why. You can ask questions, ask for a different approach, or decline.
3. Positioning. You're placed so the target joint can be moved precisely: lying on your side for the low back, face down for the mid back, on your back or seated for the neck.
4. Taking up the slack. Your chiropractor makes a specific contact with their hands and moves you to the end of the joint's comfortable range. You'll feel firm pressure. Breathing out and relaxing helps.
5. The thrust. A quick, short, controlled movement. It's over almost before you notice it. You may hear one or more pops.
6. The recheck. Your chiropractor retests the movement or the spot that was tender, to see whether anything changed.

How do chiropractic adjustments work?

The research suggests an adjustment works through a combination of mechanical and nervous system effects, rather than by moving bones back into line:

• Joint movement. The adjustment briefly gaps the joint surfaces and stretches the joint capsule, which can help a stiff joint move more freely.
• Cavitation. The pressure drop inside the joint forms a gas bubble in the joint fluid. That's the pop. It isn't bones cracking, and it isn't a sign the adjustment worked. See what happens when a chiropractor cracks your back.
• Muscle response. Muscles guarding a sore area often relax for a while after an adjustment.
• Pain processing. The quick input from the joint and surrounding tissues may reduce pain sensitivity in that area in the short term.

Those effects tend to be strongest in the hours and days afterwards, which is why adjustments work best as part of a plan that includes movement and exercise. Clinical guidelines for low back pain include spinal manipulation among the options, alongside exercise and staying active.

What a chiropractic adjustment does in your nervous system

The thrust lasts less than about a fifth of a second, but it sends a burst of sensory input from the deep muscles and tissues around the joint to your brain. Those small muscles are full of sensors that report where your spine is and how it's moving. The modern model of a vertebral subluxation is a segment the brain isn't sensing or controlling well, and the adjustment gives the brain fresh information about it to work with¹.

Researchers have measured what happens next using EEG and brain stimulation:

• Sensory processing. In a study of 19 people with mild, recurring spinal pain, a single session of adjustments reduced a brain response linked to how the prefrontal cortex handles information from the body².
• Signal to muscles. Other studies found the brain's output to arm and leg muscles increased for a short time after adjustments^3,4.

A 2024 double-blind trial went further: the brain's response changed when the chiropractor adjusted the segment their assessment flagged, not a different one⁵. What it tells us is that an adjustment is a nervous system event, not only a mechanical one. For the bigger picture, see chiropractic and your nervous system.

What an adjustment feels like in different areas

An adjustment shouldn't be sharply painful. If something doesn't feel right, say so and your chiropractor will change what they're doing.

What happens after a chiropractic adjustment?

Many people feel looser or lighter straight away. Some feel nothing much at first. Mild soreness, stiffness or tiredness for a day or two is the most common reaction, similar to after exercise you're not used to, and it usually settles on its own. Read more in the side effects of chiropractic treatment.

What you do next matters. Staying gently active, following any home exercises, and paying attention to how you sit and sleep all help. How long the change lasts varies from person to person, which we explain in how long chiropractic adjustments last.

How we approach this at MPCC

At Mornington Peninsula Chiropractic, your first visit is a new patient appointment of 30 to 40 minutes. We hear your story, take digital posture pictures and do a thorough chiropractic, orthopaedic and neurological check of your spine, joints and nerves. If your history and check point to X-rays, we'll refer you, and the imaging clinic we refer to bulk bills X-rays our chiropractors request.

Whether you're adjusted on that first visit is up to the clinical judgement of your chiropractor. Often more testing comes first. At your report of findings appointment you get answers: what we found, in plain English, and what we'd do. Our care uses hands-on adjustments, the flexion-distraction table and home exercises, chosen to suit you.

New patient appointments are $125 when booked online through our website (usually $195; new practice members only, one per person).