Aging, Cognitive Impairment, Physical Activity
Conditions
Brief summary
Over 50% of the Veterans enrolled for VA health care are over the age of 65. Dementia prevalence increases with age, and with the increase in the population of people ages 65 and older, the total number of people with dementia is also increasing. Older Veterans often have comorbid PTSD, major depression and traumatic brain injury so that they are at 2 to 5 times the risk for cognitive impairment and dementia compared to the general population. There is evidence that exercise interventions in sedentary older adults could improve both physical and cognitive function. However, there have been very few studies on the effects of exercise on cognition in older Veterans and do not reflect the broader ethnic and health-status diversity of Veterans. Thus, improved knowledge of the role of exercise on cognition as well as the predictive power of biomarkers could have a major beneficial impact on Veterans' functional independence and quality of life. The investigators hypothesize that participation in the VA Gerofit exercise program will improve cognitive function in older Veterans and that blood and muscle biomarkers will predict these improvements.
Interventions
BEHAVIORALGerofit exercise
Individualized exercise prescription as well as a group exercise class based on physical function assessments offered 3x/week
BEHAVIORALHealth education
Scheduled monthly in-person health education discussion sessions covering 12 different health topics not including a physical activity/exercise promotion session
Sponsors
VA Office of Research and Development
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
SINGLE (Outcomes Assessor)
Masking description
Gerofit intervention vs Health Education Control
Intervention model description
randomized controlled study
Eligibility
Sex/Gender
ALL
Age
65 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* All Veterans eligible for VA Gerofit program 65 years and older * Clearance by PCP to participate in Gerofit exercise program
Exclusion criteria
* Inability to perform ADLs * Significant cognitive impairment * Inability to function independently without assistance * Unstable angina; proliferative diabetic retinopathy * Oxygen dependent * Unwillingly to commute and/or not able to provide own transportation to Gerofit * Incontinence * Open wounds * Volatile behavioral issue or unable to work successfully in a group environment/setting * Active substance abuse * Homelessness
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Memory composite score | Change from baseline at 3 months | HVLT-R, verbal memory and BVMT-R, visual memory |
| Executive Function composite score | Change from baseline at 3 months | Stroop C, Trails B, Digit span backwards and sequencing from WAIS-IV, verbal fluency, FAS and animals |
| Total BDNF | Change from baseline at 3 months | Total brain derived neurotrophic factor (BDNF) concentrations in serum |
| Mature BDNF | Change from baseline at 3 months | Mature brain derived neurotrophic factor (BDNF) concentrations in serum |
Countries
United States
Contacts
CONTACTCathy C Lee, MD
PRINCIPAL_INVESTIGATORCathy C Lee, MD
VA Greater Los Angeles Healthcare System, West Los Angeles, CA
PRINCIPAL_INVESTIGATORJonathan M Wanagat, MD PhD
VA Greater Los Angeles Healthcare System, West Los Angeles, CA
PRINCIPAL_INVESTIGATORStacy Wilkins, PhD
VA Greater Los Angeles Healthcare System, West Los Angeles, CA
Outcome results
None listed