Nearly 1 in 10 older Americans have dementia, which is a devastating condition that leads to a progressive loss of independence and functional status. Mild cognitive impairment (MCI) is an intermediate stage between the expected cognitive decline of normal aging and the more-serious decline of dementia. The investigators have developed a novel, integrative exercise program called Preventing Loss of Independence through Exercise (PLIE) that incorporates elements from Eastern and Western exercise modalities and is designed to build and maintain the capacity to perform basic functional movements while increasing mindful body awareness and enhancing social connection. Pilot study results suggest that PLIE is associated with meaningful improvements in physical function, cognitive function and quality of life in individuals with dementia, as well as reduced caregiver burden. The goal of the current study is to perform a randomized, controlled trial to test the efficacy of PLIE in older adults who have MCI but who do not yet have dementia. The investigators will also investigate the neural mechanisms underlying PLIE by acquiring brain imaging measures.
The goal of the proposed study is to perform a randomized, controlled trial (RCT) to test the efficacy of a novel integrative exercise program called Preventing Loss of Independence through Exercise (PLIE) on function and quality of life in older adults living in the community with Mild cognitive impairment (MCI), which is an intermediate stage between the expected cognitive decline of normal aging and the more-serious decline of dementia. Because current dementia medications have minimal impact on function and quality of life and do not stop or slow the disease course, it would be desirable if there were an intervention that could prevent or delay the onset of full-blown dementia. Moreover, there is growing evidence that behavioral interventions such as exercise have a variety of beneficial effects in individuals with dementia and MCI. PLIE was developed based on recent discoveries in neuroscience and experimental psychology that have found that, although explicit memory (the ability to consciously recall new information) is impaired in individuals with dementia, implicit memory (unconscious learning that typically occurs through repeated exposure) is relatively preserved. Therefore, PLIE focuses on training procedural memory (unconscious learning of procedures) to build the strength and capacity to perform the movements that are most needed for daily function (e.g., transitioning safely from sitting to standing). In addition, to maximize the benefits of the training, PLIE integrates elements of Eastern and Western exercise modalities to develop mindful body awareness and enhance social connection. The investigators have completed a pilot study of the PLIE program at an adult day center in San Francisco, CA. Results suggest that PLIE was associated with clinically meaningful improvements in cognitive function, physical performance and quality of life as well as reduced caregiver burden when compared with usual care at the facility. The current study will enable the investigators to build on this pilot study results by performing a RCT of PLIE for individuals who have MCI but who do not yet have dementia. Study participants will be randomly assigned to receive the PLIE intervention program (1 hour, 2 days/week, 4 months) or Usual Care (UC) control (standard senior center activities, 1 hour, 2 days/week, 4 months) (N=40, 20/group) using a wait-list design. The co-primary outcomes are 4-month change in physical function (Short Physical Performance Battery, SPPB), cognitive function (Alzheimer's Disease Assessment Scale - cognitive subscale, ADAS-cog) and quality of life (Quality of Life in Alzheimer's Disease, QOL-AD). The investigators will also look at the 4-month change in the following neuroimaging measures: brain volume with structural magnetic resonance imaging (MRI), functional connectivity with resting-state functional MRI, cerebral perfusion with arterial-spin labeled MRI. To account for the wait-list design, all outcomes will be assessed at baseline, 4 months and 8 months. The proposed project will address a critically important health problem related to optimizing functional status and quality of life in older individuals with MCI. The current study will utilize rigorous research methods to test the efficacy of an innovative and promising new program for older adults with MCI. If the program is successful, the investigators will work with VA and community-based organizations to implement PLIE more broadly.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
SUPPORTIVE_CARE
Masking
NONE
Enrollment
41
PLIE is an integrative exercise program that focuses on training procedural memory for the ability to perform the movements that are most needed for daily function (e.g., transitioning safely from sitting to standing) while increasing mindful body awareness and encouraging social connection. It combines elements from a wide range of Eastern and Western exercise modalities, including occupational therapy, physical therapy, yoga, tai chi, Feldenkrais, Rosen Method, dance movement therapy and mindfulness meditation.
San Francisco VA Medical Center, San Francisco, CA
San Francisco, California, United States
Change in Alzheimer's Disease Assessment Scale-cognitive Subscale (ADAS-cog)
The Alzheimer's Disease Assessment Scale - cognitive subscale (ADAS-cog) is one of the most commonly used outcome measures in dementia drug treatment trials and is one of the measures considered by the Food and Drug Administration for approval of dementia medications. It includes direct assessment of learning (10-word list), naming (objects), following commands, constructional praxis (figure copying), ideational praxis (mailing a letter), orientation (person, time, place), recognition memory and remembering test instructions. Scores may range from 0 to 70 with higher scores reflecting worse cognitive function. Prior studies have found the ADAS-cog to be valid and reliable with Cronbach's alpha greater than 0.8 and test-retest reliability above 0.9. Because we examined the difference from baseline to post-treatment, a positive change score indicates improvement while a negative change score indicates decline.
Time frame: baseline to 12 weeks
Short Physical Performance Battery (SPPB)
The SPPB was developed by the National Institute on Aging to provide an objective tool for measuring physical performance in older adults. Lower body strength is assessed based on time to complete 5 chair stands without using arms. Balance is assessed based on the ability to hold different stands for 10 seconds, including the side-by-side, semi-tandem and full tandem stands. Mobility is assessed based on usual walking speed over a 3-meter walking course. The total SPPB score is the sum of the 3 component scores and may range from 0 to 12. Higher scores reflect better performance. Because we examined the difference from baseline to post-treatment, a negative change score indicates improvement while a positive change score indicates decline.
Time frame: baseline to 12 weeks
Interoceptive Self-Regulation, Assessed With the Multidimensional Assessment of Interoceptive Awareness, Version 2 (MAIA-2)
The MAIA is a 37-item self-report questionnaire, consists of eight scales: Noticing, Not-Distracting, Not-Worrying, Attention Regulation, Emotional Awareness, Interoceptive Self-Regulation, Body Listening, and Trust. To avoid overburdening participants with the entire questionnaire, we will focus on interoceptive self-regulation, the ability to regulate distress by attention to body sensations, which has previously been shown to respond to mindfulness interventions. Interoceptive Self-Regulation scores on the MAIA-2 range from 0-5, with lower scores indicating lower ability to regulate distress by paying attention to body sensations. Because we examined the difference from baseline to post-treatment, a negative change score indicates improvement while a positive change score indicates decline.
Time frame: baseline to week 12
Attention Regulation, Assessed With the Multidimensional Assessment of Interoceptive Awareness, Version 2 (MAIA-2)
The MAIA, a 37-item self-report questionnaire, consists of eight scales: Noticing, Not-Distracting, Not-Worrying, Attention Regulation, Emotional Awareness, Interoceptive Self-Regulation, Body Listening, and Trust. To avoid overburdening participants with the entire MAIA-2 questionnaire, we focused the ability to sustain and control attention to body sensations (i.e., attention regulation), which has been shown to respond to mindfulness interventions. Attention Regulation scores on the MAIA-2 range from 0-5, with lower scores indicating lower ability to sustain and control attention to body sensations. Because we examined change from baseline to post-treatment, a negative change score indicates improvement in the ability to sustain and control attention to body sensations.
Time frame: baseline to week 12
PROMIS Social Isolation
The Patient-Reported Outcomes Measurement Information System (PROMIS) Social Isolation questionnaire assesses perceptions of being avoided, excluded, detached, disconnected from, or unknown by, others with 4 questions (1- I feel left out; 2- I feel that people barely know me; 3- I feel isolated from others; 4-I feel that people are around me but not with me). Subjects respond to each statement with a Likert scale ranging from 1 (never) to 5 (always). Total scores range from 0-20, with higher scores indicating greater feelings of social isolation. Because we calculated a change score (baseline - post-treatment), a positive change score indicates a decrease in feelings of social isolation from baseline to post-treatment.
Time frame: baseline to week 12
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