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J Manipulative Physiol Ther. 2005 Mar-Apr;28(3):159-63.

The effect of low force chiropractic adjustments for 4 weeks on body surface electromagnetic field.

Author information

1
Research Department, Logan College of Chiropractic, Chesterfield, MO 63017, USA. John.Zhang@Logan.edu

Abstract

OBJECTIVE:

To study the effects of 4 weeks of low-force chiropractic adjustments on body surface electromagnetic fields (EMFs).

METHOD:

Thirty-five chiropractic students randomly assigned into control (17 subjects) and experimental groups (28 subjects). A triaxial fluxgate magnetometer was used for EMF detection. The subjects' body surface EMF was determined in the prone position before and after the chiropractic adjustment. A Toftness low-force chiropractic adjustment was applied to the cervical, thoracic, lumbar, and sacral areas as determined by the practitioner. Heart rate variability analysis was recorded once a week to determine autonomic nervous system activity in both the control and experimental groups.

RESULTS:

The EMF on the subjects' body surface decreased after chiropractic adjustment at the cervical, thoracic, lumbar, and sacral regions in all 6 visits during the 4-week treatment period. The EMF showed a downtrend over the 4-week period after the low-force adjustment. The same changes were not observed in the control group. The chiropractic adjustment group had a slight decrease in heart rate over the 4-week treatment period, and no significant change was observed in the control group. Heart rate variability analysis did not show consistent changes before and after the low-force adjustments during the treatment period.

CONCLUSION:

Low-force chiropractic adjustment in the cervical and thoracic areas resulted in a consistent reduction of the body surface EMF after 4 weeks of active treatment. No statistically significant differences were found in the heart rate and heart rate variability in the 4-week study.

PMID:
15855902
DOI:
10.1016/j.jmpt.2005.02.009
[Indexed for MEDLINE]

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