11/06/2025
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The force of a chiropractic adjustment varies significantly depending on the patient's needs and the technique used, but it often relies more on speed and precision than on high force. F=MXA.
Studies show a wide range of forces, from an average peak of about 79.5N for some cervical adjustments to much higher forces, around 400N or more, for thoracic or lumbar adjustments, according to ScienceDirect.com. Factors like the patient's age, bone density, and specific condition determine the amount of force applied.
Force varies by technique
Traditional adjustments: For otherwise healthy individuals, skilled chiropractors use experience and physical assessment to apply a "deep force" adjustment with the necessary speed and precision to move a joint.
Low-force techniques: Methods like the Activator method use a tool to deliver a spring-loaded, high-velocity, low-amplitude impulse to a specific point, which is a much gentler way to mobilize a vertebra.
Instrument-assisted techniques: Some instruments, like the one used in Atlas Orthogonal chiropractic, deliver a percussive force of about six pounds (26.7N)
Force varies by body region
Cervical (neck) adjustments: A 2024 study found the average peak force to be around
79.5N.
Thoracic and lumbar (back) adjustments: Peak forces can be substantially smaller for neck manipulations than for the thoracic and lumbar spine, which may require forces around 400N.
How force is determined
A chiropractor will consider the patient's age, injuries, and conditions like osteoporosis when deciding on the right force and technique.
Assessment of the patient's posture, flexibility, and muscle tone is used to determine how much force is needed.
The goal is to use the minimum force necessary for an effective adjustment, balancing force with speed, notes Natural Health Practices.