The purpose of this study is to compare the effects of three on-line wellness interventions for improving physical and cognitive function and brain connectivity in adults who are at least 55 years old and are experiencing symptoms of memory and/or cognitive difficulties.
The proposed study will perform a randomized, controlled trial (RCT) to compare the effects of three on-line wellness interventions for adults (age 55 years and older) who are experiencing memory and/or cognitive decline. Study participants will be randomly assigned to one of three on-line wellness interventions: (a) Tai Chi, (b) mindful movement course, or (c) health and wellness education course. All interventions will be one hour long, held on-line twice a week for 12 weeks. The co-primary outcomes are 3-month change in cognitive function (Alzheimer's Disease Assessment Scale - cognitive subscale, ADAS-cog) and functional brain connectivity within the default mode network (DMN). Secondary behavioral outcomes will include measures of specific cognitive processes (e.g., auditory memory, executive function, processing speed), physical function (e.g., mobility), anxiety, depression, fatigue, pain, sleep quality, social activities/social isolation, and quality of life. Secondary neuroimaging outcomes will include measures of functional connectivity in other intrinsic brain networks (e.g., salience, central executive, language), cerebral perfusion, and structural white matter integrity. The behavioral and imaging outcomes will be assessed at baseline and upon completion of the 12-week interventions. To assess durability of the behavioral effects of the interventions, the cognitive and behavioral outcomes will be assessed again 6 months after the completion of the interventions.
