The effect of Tai Chi on cardiorespiratory function in patients with coronary artery bypass surgery.

PURPOSE This study prospectively evaluated the training effect of a 1-yr Tai Chi Chuan (TCC) program for low-risk patients with coronary artery bypass surgery (CABS) after a postoperative outpatient (phase II) cardiac rehabilitation program. METHODS Twenty patients with mean age of 56.5+/-7.4 yr completed this study. The TCC group included nine men who practiced classical Yang TCC with an exercise intensity of 48-57% heart rate range (HRR). The control group included 11 men whom were recommended to do a home-based self-adjusted exercise program with similar intensity of phase II cardiac rehabilitation. Graded exercise tests were performed before and after 1 yr of training for all subjects. RESULTS Mean attendance of the TCC group was 3.8+/-1.5 times weekly in contrast to 1.7+/-1.1 times for the control group. During the follow-up examination, the TCC group increased 10.3% in VO2peak (from 26.2+/-4.4 to 28.9+/-5.0 mL x kg(-1) min(-1), P<0.01) and increased 11.9% in peak work rate (from 135+/-26 W to 151+/-28 W, P<0.01). However, the control group showed slight decrease in VO2peak from 26.0+/-3.9 to 25.6+/-4.6 mL x kg(-1) x min(-1) and in peak work rate from 131+/-23 W to 128+/-32 W. At the ventilatory threshold, the TCC group also showed significant increase in VO2 and work rate (P<0.05). The control group did not significantly change in these variables. CONCLUSIONS The study demonstrated that a 1-yr TCC program for low-risk patients with CABS could favorably enhance cardiorespiratory function.

[1]  P Jin,et al.  Changes in heart rate, noradrenaline, cortisol and mood during Tai Chi. , 1989, Journal of psychosomatic research.

[2]  P. Jin,et al.  Efficacy of Tai Chi, brisk walking, meditation, and reading in reducing mental and emotional stress. , 1992, Journal of psychosomatic research.

[3]  Lippincott Williams Wilkins,et al.  Cardiac rehabilitation programs. A statement for healthcare professionals from the American Heart Association. , 1994, Circulation.

[4]  S. Wolf,et al.  Reducing Frailty and Falls in Older Persons: An Investigation of Tai Chi and Computerized Balance Training , 1996, Journal of the American Geriatrics Society.

[5]  J. Blumenthal,et al.  Comparison of high- and low-intensity exercise training early after acute myocardial infarction. , 1988, The American journal of cardiology.

[6]  E. Coyle,et al.  Blood lactate threshold in some well-trained ischemic heart disease patients. , 1983, Journal of applied physiology: respiratory, environmental and exercise physiology.

[7]  F. Nagle,et al.  Aortocoronary bypass surgery: effects of surgery and 32 months of physical conditioning on treadmill performance. , 1978, Archives of physical medicine and rehabilitation.

[8]  J S Lai,et al.  Cardiorespiratory function, flexibility, and body composition among geriatric Tai Chi Chuan practitioners. , 1996, Archives of physical medicine and rehabilitation.

[9]  S. Wolf,et al.  Exploring the basis for Tai Chi Chuan as a therapeutic exercise approach. , 1997, Archives of physical medicine and rehabilitation.

[10]  B. Whipp,et al.  Anaerobic threshold alterations caused by endurance training in middle-aged men. , 1979, Journal of applied physiology: respiratory, environmental and exercise physiology.

[11]  K. Wasserman,et al.  DETECTING THE THRESHOLD OF ANAEROBIC METABOLISM IN CARDIAC PATIENTS DURING EXERCISE. , 1964, The American journal of cardiology.

[12]  R. Stevens,et al.  Comparison of supervised and unsupervised exercise training after coronary bypass surgery. , 1984, The American journal of cardiology.

[13]  Lester M. Wolfson,et al.  Balance and Strength Training in Older Adults: Intervention Gains and Tai Chi Maintenance , 1996, Journal of the American Geriatrics Society.

[14]  G. H. Hartung,et al.  Exercise training in post-myocardial infarction patients: comparison of results with high risk coronary and post-bypass patients. , 1981, Archives of physical medicine and rehabilitation.

[15]  A. Kirsteins,et al.  EVALUATING THE SAFETY AND POTENTIAL USE OF A WEIGHT-BEARING EXERCISE, TAI-CHI CHUAN, FOR RHEUMATOID ARTHRITIS PATIENTS , 1991, American journal of physical medicine & rehabilitation.

[16]  Bruce D. Johnson,et al.  Sequential assessment of exercise tolerance in heart transplantation compared with coronary artery bypass surgery after phase II cardiac rehabilitation. , 1996, The American journal of cardiology.

[17]  D M Bailey,et al.  T'ai chi and postural control in the well elderly. , 1992, The American journal of occupational therapy : official publication of the American Occupational Therapy Association.

[18]  L. Rubenstein,et al.  Geriatric Rehabilitation: What Do Physicians Know about It and How Should They Use It? , 1994, Journal of the American Geriatrics Society.

[19]  J S Lai,et al.  Two‐Year Trends in Cardiorespiratory Function Among Older Tai Chi Chuan Practitioners and Sedentary Subjects , 1995, Journal of the American Geriatrics Society.

[20]  P. Macdonald,et al.  Effect of early programmes of high and low intensity exercise on physical performance after transmural acute myocardial infarction. , 1991, British heart journal.

[21]  J S Lai,et al.  12-month Tai Chi training in the elderly: its effect on health fitness. , 1998, Medicine and science in sports and exercise.

[22]  K S Channer,et al.  Changes in haemodynamic parameters following Tai Chi Chuan and aerobic exercise in patients recovering from acute myocardial infarction. , 1996, Postgraduate medical journal.

[23]  W L Beaver,et al.  Anaerobic threshold and respiratory gas exchange during exercise. , 1973, Journal of applied physiology.

[24]  Beth Rosenberg,et al.  Low to Moderate Intensity Endurance Training in Healthy Older Adults: Physiological Responses after Four Months , 1992, Journal of the American Geriatrics Society.