Biofield-based therapies: a systematic review of physiological effects on practitioners during healing.
BACKGROUND
Several recent reviews have reached guardedly positive conclusions about the effectivenessof biofield therapies in healthcare.(1,2) These studies mainly involved randomized controlled trials to determine changes in condition-related outcome measures, but few addressed the biological basis of these effects.


STUDY OBJECTIVE AND RATIONALE
We performed a systematic review of studies designed to examine whether biofield therapists undergo physiological changes as they enter the healing state. If reproducible changes can be identified, they may serve as markers to reveal events that correlate with the healing process.


METHODS
Databases were searched for controlled or non-controlled studies of biofield therapies in which physiological measurements were made on practitioners in a healing state, with or without a healee present. Design and reporting criteria, developed in part to reflect the pilot nature of the included studies, were applied using a yes (1.0), partial (0.5), or no (0) scoring system.


RESULTS
Of 67 identified studies, the inclusion criteria were met by 22, 10 of which involved human healees. Overall, the studies were of moderate to poor quality and many omitted information about the training and experience of the healer. The most frequently measured biomarkers were electroencephalography (EEG) and heart rate variability (HRV). EEG changes were inconsistent and not specific to biofield therapies. HRV results suggest an aroused physiology for Reconnective Healing, Bruyere healing, and Hawaiian healing but no changes were detected for Reiki or Therapeutic Touch.


CONCLUSIONS
Despite a decades-long research interest in identifying healing-related biomarkers in biofield healers, little robust evidence of unique physiological changes has emerged to define the healers׳ state.
['Baldwin|Ann Linda|AL|', 'Hammerschlag|Richard|R|']
D004569:Electroencephalography D006282:Health Personnel D006339:Heart Rate D006801:Humans D026441:Mind-Body Therapies D011603:Psychophysiology
Reiki therapeutic touch brain biofield healing touch heart biofield qigong