Scientific research published in the peer reviewed Journal of Vertebral Subluxation Research shows significant improvement in breathing capacity following subluxation (joint dysfunction) correction in the upper neck. These corrections were made by specific chiropractic adjustments. The study utilized spirometric measurements involving both forced vital capacity (FVC) — the amount of air a person can breathe in — and forced expiratory volume (FEV1) — the amount of air breathed out in one second.
The most dramatic improvements following adjustments were in those with deficient FCV and FEV1, but improvements in both inspiration and expiration were also noted in those in the normal range. Significant improvement was seen in both males and females. Subjects in the 48-80 year old age group improved more than the younger subjects.
These findings correlate with clinical observations by Dr. Steve Eustice and other DCs. Related chiropractic research on asthma improvement supports these findings as well.