Tai Chi, Physiologic Complexity, and Healthy Aging
To evaluate the effects of Tai Chi—a mind-body exercise--on age-related loss of physiological complexity (using fractal and entropy based measures), and to understand the relationship between complexity, function and adaptability, we will conduct a two-arm prospective randomized clinical trial. Our overarching goal is to evaluate if six months of Tai Chi training, compared to a waitlist control receiving standard medical care, can enhance physiological complexity and adaptability in older Tai Chi-naïve adults. Secondary goals of the study are to characterize the relationship between complexity biomarkers, measures of function, and resilience. This pilot study will inform a future more definitive trial by providing information on recruitment and retention, compliance, dose-dependent effects, preliminary estimates of effect size, and the optimal biomarkers of complexity, function, and adaptive capacity.
|Study Design:||Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Single Blind (Outcomes Assessor)
Primary Purpose: Prevention
|Official Title:||Tai Chi, Physiologic Complexity, and Healthy Aging|
- Change in Heart rate complexity [ Time Frame: 0, 3, and 6 months ] [ Designated as safety issue: No ]Beat-to-beat variation measured using ECG for a 30 minute during seated quiet resting
- Change in Center of Pressure complexity [ Time Frame: 0, 3 and 6 months ] [ Designated as safety issue: No ]Center of pressure (COP) dynamics during quiet standing with eyes open
|Study Start Date:||March 2011|
|Study Completion Date:||October 2013|
|Primary Completion Date:||October 2013 (Final data collection date for primary outcome measure)|
Behavioral: Tai Chi
Usual care, individuals attend testing sessions for 6 months with testing at times 0, 3, and 6 months. Individuals in Usual Care receive 3 months of Tai Chi at the study end.
Experimental: Tai Chi
Individuals will take part in community-based Tai Chi classes twice a week for 6 months as well as practice Tai Chi outside of class twice a week for the same 6 month period.
Behavioral: Tai Chi Exercise
Practicing Tai Chi exercise 4 times a week for 6 months - twice in a classroom and twice independently
Specific Aim #1: To determine if 6 months of Tai Chi training can increase complexity, function, and adaptive capacity of multiple physiological systems in older healthy adults. Specific Aim #2: To determine the relationships between biomarkers of physiological complexity, conventional measures of function and adaptive capacity. Statistical regression models will be used to determine relationships, both at baseline and overtime, between a) complexity biomarkers and measures of physical and cognitive function, and b) complexity biomarkers and adaptive capacity. Elucidating these relationships will further inform the interpretation of complexity biomarkers and provide insights into underlying component mechanisms contributing to complex physiological dynamics.
|United States, Massachusetts|
|Beth Israel Deaconess Medical Center|
|Brookline, Massachusetts, United States, 02215|
|Principal Investigator:||Peter M Wayne, PhD||Harvard Medical School|