Interim follow-up of a randomized controlled trial comparing Chinese style mind body (Tai Chi) and stretching exercises on cognitive function in subjects at risk of progressive cognitive decline

• Published in: International journal of geriatric psychiatry Vol. 26; no. 7; pp. 733 - 740
• Main Authors: Lam, Linda C. W., Chau, Rachel C. M., Wong, Billy M. L., Fung, Ada W. T., Lui, Victor W. C., Tam, Cindy C. W., Leung, Grace T. Y., Kwok, Timothy C. Y., Chiu, Helen F. K., Ng, Sammy, Chan, W. M.
• Format: Journal Article
• Language: English
• Published: Chichester, UK John Wiley & Sons, Ltd 01.07.2011; Psychology Press; Wiley Subscription Services, Inc
• Subjects: Aged; Aged, 80 and over; Biological and medical sciences; clinical trial; Clinical trials; Cognition - physiology; Cognition Disorders - psychology; Cognition Disorders - therapy; Cognitive ability; Dementia - psychology; Dementia - therapy; Disease Progression; Female; Fundamental and applied biological sciences. Psychology; General aspects; Geriatric psychiatry; Geriatrics; Health Promotion - methods; Humans; Male; Medical sciences; mild cognitive impairment; Mind body relationship; Muscle Stretching Exercises - methods; Older people; physical activity; Psychiatric Status Rating Scales; Psychoanalysis; Psychology. Psychoanalysis. Psychiatry; Psychopathology. Psychiatry; Regression analysis; Tai Ji - methods; Traditional Chinese medicine; Asia; China; Physical exercise; Human; Asiatic; Cognitive disorder; Controlled therapeutic trial; Cognition; physical activity; Intellectual deterioration; Progressive; Randomization; Follow up study; Risk factor; Chinese; Clinical trial; mild cognitive impairment; Body; Stretching; Comparative study
• ISSN: 0885-6230; 1099-1166; 1099-1166
• DOI: 10.1002/gps.2602

Objectives We reported the interim findings of a randomized controlled trial (RCT) to examine the effects of a mind body physical exercise (Tai Chi) on cognitive function in Chinese subjects at risk of cognitive decline. Subjects 389 Chinese older persons with either a Clinical Dementia Rating (CDR 0.5) or amnestic‐MCI participated in an exercise program. The exercise intervention lasted for 1 year; 171 subjects were trained with 24 forms simplified Tai Chi (Intervention, I) and 218 were trained with stretching and toning exercise (Control, C). The exercise comprised of advised exercise sessions of at least three times per week. Results At 5th months (2 months after completion of training), both I and C subjects showed an improvement in global cognitive function, delayed recall and subjective cognitive complaints (paired t‐tests, p < 0.05). Improvements in visual spans and CDR sum of boxes scores were observed in I group (paired t‐tests, p < 0.001). Three (2.2%) and 21(10.8%) subjects from the I and C groups progressed to dementia (Pearson chi square = 8.71, OR = 5.34, 95% CI 1.56–18.29). Logistic regression analysis controlled for baseline group differences in education and cognitive function suggested I group was associated with stable CDR (OR = 0.14, 95%CI = 0.03–0.71, p = 0.02). Conclusions Our interim findings showed that Chinese style mind body (Tai Chi) exercise may offer specific benefits to cognition, potential clinical interests should be further explored with longer observation period. Copyright © 2010 John Wiley & Sons, Ltd.