title: [Effects of long-term Tai Ji Quan exercise on automatic nervous modulation in the elderly].
abstract: OBJECTIVE
  To examine the effects of long-term Tai Ji Quan (Chinnese Traditional Exercise) on automatic nervous modulation in the elders.
  
  
  METHODS
  The 18 subjects from Tai Ji Quan exercise class in Liaoning University of Retired Veteran Cadres were assigned into long-term Tai Ji Quan exercise group including 10 subjects and novice group including 8 subjects. Electrocardiography, respiratory and blood pressure data were collected on the following time points: at rest before Tai Ji Qhuan exercise and 30 min or 60 min after Tai Ji Quan exercise.
  
  
  RESULTS
  The subjects at rest state in the long-term Tai Ji Quan exercise group showed higher than the subjects in the novice group in resperitory rate (RR), standard deviations of normal to normal intervals (SDNN), total power (TP), low frequency power (LFP), high frequency power (HFP), normalized high frequency power (nHFP), but lower in LFP/HFP, systolic and diastolic blood pressure, and heart rate. At rest state the respiratory rate of subjects in long-term Tai Ji Quan exercise group was significantly lower than the novices. After Tai Ji Quan exercise, TP, nHFP, LFP/HFP, heart rate and systolic pressure showed significantly changes, and the change level of Tai Ji Quan on these indices was larger in Tai Ji Quan exercise group than that in the novice group.
  
  
  CONCLUSIONS
  Long-term Tai Ji Quan exercise can improve vagal modulations, and tend to reduce the sympathetic modulations.
authors.forename: Feng
authors.initials: F
authors.lastname: Guo
mesh_terms: D000368:Aged; D001007:Anxiety; D001341:Autonomic Nervous System / Q000502:physiology*; D001794:Blood Pressure; D004562:Electrocardiography; D015444:Exercise; D006339:Heart Rate; D006801:Humans; D026302:Tai Ji