title: Laser needle acupuncture at Neiguan (PC6) does not mediate heart rate variability in young, healthy men.
abstract: OBJECTIVE
  The aim of this randomized, double-blinded, placebo-controlled trial was to evaluate specific effects of laser needle acupuncture at the Neiguan point (PC6) on sympathetic and parasympathetic nerve activity in healthy subjects using heart rate variability (HRV) analysis.
  
  
  BACKGROUND
  Acupuncture at the Neiguan point (PC6) has been shown to modulate the autonomic nervous system.
  
  
  METHODS
  Forty-five healthy non-smoking males were randomly divided into a placebo group (n = 20) with no laser irradiation and into an intervention group (n = 25) for which laser needle irradiation (36.8 kJ/cm(2)) was performed on the right forearm. Monitoring of HRV was performed before, during, and after intervention.
  
  
  RESULTS
  Repeated-measures MANOVA did not show statistically significant main effects of time (F = 1.29, p = 0.27) or of group (F = 1.67, p = 0.16). The time by group interaction was also not statistically significant (F = 0.95, p = 0.54).
  
  
  CONCLUSIONS
  Our results suggest that heart rate variability was not influenced by laser needle acupuncture at the Neiguan point (PC6).
authors.affiliation: Department of Sports Medicine, Johann Wolfgang Goethe-University Frankfurt am Main, Frankfurt/Main, Germany. m.huebscher@sport.uni-frankfurt.de
authors.forename: Markus
authors.initials: M
authors.lastname: Hübscher
authors.forename: Lutz
authors.initials: L
authors.lastname: Vogt
authors.forename: Winfried
authors.initials: W
authors.lastname: Banzer
mesh_terms: D015670:Acupuncture Therapy; D004311:Double-Blind Method; D006339:Heart Rate / Q000528:radiation effects*; D006801:Humans; D028022:Low-Level Light Therapy; D008297:Male; D010496:Pericardium / Q000528:radiation effects*; D012016:Reference Values