Abstract 17099: Selective Improvement of Quality of Life and Perceived Exercise Capacity Compared to Measured Exercise Capacity After Tai Chi Training: A Randomized Controlled Trial in Chronic Stable Heart Failure
Objective: To investigate whether a tailored 12-week tai chi exercise program as an adjunct to standard care improves health related quality of life and functional capacity in patients with chronic heart failure (HF).
Subjects And Methods: We randomized 100 patients with chronic systolic HF (New York Heart Association Class 1–3, left ventricular ejection fraction ≤ 40%) to a 12-week group tai chi exercise program (n=50), or to a time-matched HF education control (n=50). Baseline impairment was moderate (mean peak VO2 13.5 ml/kg/min). Our primary outcomes were quality of life (Minnesota Living with HF questionnaire-MLHF) and exercise capacity (peak oxygen uptake on cardiopulmonary exercise stress test and six-minute-walk). Secondary outcomes explored the effect of tai chi exercise on psychosocial and physiological indices including exercise self-efficacy (Cardiac Exercise Self-Efficacy Scale- CESE, range 1–5) and mood (Profile of Mood States- POMS).
Results: The mean age (±SD) of study patients was 67±11 years, mean baseline EF was 29±8%, median NYHA class 2. At the end of 12 weeks, patients randomized to tai chi reported improvements in MLHF quality of life scores compared to the control group (change±SD of -13.7±16.3 vs -5.9 ±18.2, p=0.02, adjusted for baseline MLHF). Similarly, there were meaningful improvements in both exercise self-efficacy (+0.3±0.5 vs. -0.1 ±0.6, p<0.001) and mood (POMS Total Mood Disturbance -9±12 vs. 0±18, p=0.01) in the tai chi group. However, both groups had equal improvements in six-minute walk distance and peak oxygen uptake (+29 ±71vs. +27±59 meters, p=0.9 and +0.4±2.7 vs. 0.3 ±2.2 ml/kg/min, p=0.9, adjusted for baseline values).
Conclusion: A 12-week group tai chi mind-body exercise program improved disease-specific quality of life, perceived exercise self-efficacy, and mood in patients with chronic HF even in the absence of differential improvement in measured exercise capacity compared to patients receiving only group attention and education.
- © 2010 by American Heart Association, Inc.