Clinical Trials Logo

Clinical Trial Details — Status: Active, not recruiting

Administrative data

NCT number NCT03803904
Other study ID # E2825-R
Secondary ID
Status Active, not recruiting
Phase Phase 2/Phase 3
First received
Last updated
Start date April 1, 2019
Est. completion date September 30, 2024

Study information

Verified date May 2024
Source VA Office of Research and Development
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

This proposal will evaluate two brain health measures, cerebrovascular perfusion and cerebrovascular reactivity (CVR), before and after a proven, interval-based, aerobic exercise intervention in older Veterans. The hypothesis is that the 12-week aerobic exercise intervention (Spin) will increase perfusion and improve CVR in brain regions susceptible to age-related decline. This information will inform the impact of exercise on cerebrovascular health which is known to be negatively impacted in aging and implicated in the development of neurogenerative disease. This information will also aid the investigators' continued efforts of clinical implementation of evidence-based exercise interventions in the local Atlanta VA and surround region.


Description:

To address the growing healthcare challenges of an aging Veteran population it is critical to understand effective rehabilitation techniques that mitigate age-related co-morbidity and improve quality of life. To date, exercise is one of a few proven interventions that attenuates age-related declines in brain health and function. A consistent but unexplained finding in many of these studies is a change in the cortical activation pattern during task, assessed using blood-oxygen-level dependent (BOLD) signal with fMRI that corresponds with improved task performance. Two key metrics of cerebrovascular health and functioning that are underexplored but may influence the documented changes in the BOLD response that is observed with post-aerobic activity are: 1) changes in resting or basal cerebral blood flow (perfusion) to key brain regions; and 2) changes in the ability of cerebrovasculature to dilate in the face of increased demand, termed cerebrovascular reactivity (CVR). The investigators' goal is to quantify the impact of aerobic exercise on cerebrovascular function and how both perfusion and CVR contributes to the BOLD signal during task-based fMRI. Consistent with the investigators' previous aging and exercise studies participants will complete one of two conditions; 1) an aerobic, interval-training intervention (Spin; n= 44), or 2) a non-aerobic, stretching control condition (Control; n=44). Cardiovascular fitness, arterial spin labeling for basal cerebral perfusion, CVR, task-based fMRI (cognitive-executive and motor), and behavioral outcomes will be assessed before and after the interventions. The specific aims will determine the effect of a 12-week aerobic exercise intervention on changes in cerebral perfusion and CVR in older Veterans. The investigators hypothesize that compared to the Control group, the aerobically-trained group will have increased basal perfusion and CVR in areas that demonstrate age-related decline and that have been demonstrated to be malleable to aerobic exercise (inferior frontal and motor cortices). Research over the last few decades have driven the continual promotion of exercise as one of the most impactful interventions of central nervous system health and function. At the forefront of much of this research is the use of task-based fMRI BOLD to quantify beneficial changes in cortical function following aerobic exercise. While transformative, the true impact of this research is limited in scope until the investigators can define the influence of cerebrovascular function on the well-documented beneficial change in BOLD response. The investigators do know that older adults who are physically active have improved vascular health but do not know the full impact of an exercise intervention on cerebrovascular health. If the hypotheses of improved perfusion and CVR is supported it would inform current intervention strategies and would add important additional information about the potential of exercise to improve brain health in aging. This would have implications for aging Veterans at risk for neurodegenerative disease brought on by cerebrovascular dysfunction.


Recruitment information / eligibility

Status Active, not recruiting
Enrollment 40
Est. completion date September 30, 2024
Est. primary completion date March 31, 2024
Accepts healthy volunteers Accepts Healthy Volunteers
Gender All
Age group 65 Years to 80 Years
Eligibility Inclusion Criteria: - Adults aged 65-80 who do not regularly exercise - defined as exercising less than 20 minutes twice per week - Are willing and able to cooperate with assessments and interventions - Participant will be quantified at or below the "poor" range for cardiovascular fitness as assessed by a volume of oxygen (VO2) test - 26.0 ml/kg/min for males - 21.0 ml/kg/min for females) - 26 on the MoCA to meet the criteria for cognitively intact - Participants will be free from diseases affecting cognition or that would interfere with their ability to engage in aerobic exercise - including but not limited to: - chronic heart - liver - kidney disease - Free from diseases/injuries directly affecting brain functions - including but not limited to: - significant closed head injury - open intracranial wounds - stroke - epilepsy - degenerative diseases of the nervous system - All subjects will speak English as a primary language and will have at minimum a high school diploma so that behavioral/cognitive measures reflect effects of aging and aerobic exercise and not unfamiliarity with the English language or a lack of education Exclusion Criteria: - Potential participants with major psychiatric disorder - including but not limited to: - psychosis - major depression - bipolar disorder - Individuals with ongoing drug or alcohol abuse and severe hypertension (systolic BP > 200 or diastolic BP > 110 mm Hg or subjects taking three or more antihypertensive medications - Participants must not have conditions incompatible with MRI - including but not limited to: - ferrous metal implants - cardiac pacemakers or similar devices - claustrophobia - morbid obesity - Persons engaging in significant skilled manual movements regularly will be excluded so that behavioral/motor measures reflect the effects of age and aerobic exercise and not the effects of frequent practice

Study Design


Related Conditions & MeSH terms


Intervention

Other:
Spin
The intervention will take place three times a week for 12 weeks and will be led by a qualified instructor (an Exercise Physiologist with five years of experience conducting the intervention). The duration of each session will be increased by 1-2 minutes to a maximum time of 45 minutes per session based on the progression of the participants and the recommendation of the instructor. Because participants are initially sedentary and detrained, exercise intensity will begin at low levels (50% of maximal heart rate reserve, HRR) but will be increased by 5% every week (if deemed necessary by the instructor) to a maximum of 75% maximal HRR.

Locations

Country Name City State
United States Atlanta VA Medical and Rehab Center, Decatur, GA Decatur Georgia

Sponsors (1)

Lead Sponsor Collaborator
VA Office of Research and Development

Country where clinical trial is conducted

United States, 

Outcome

Type Measure Description Time frame Safety issue
Primary Arterial Spin Labeling (ASL) to Measure Cerebral Blood Flow Change ASL is a robust, sensitive and specific, non-invasive technique used for determining the amount of arterial blood flow to the whole brain or a particular ROI.47,48 In ASL, arterial blood water is magnetically labeled at the ROI by applying a 180 degree radiofrequency inversion pulse, resulting in magnetization of the blood water. The labeled water exchanges with tissue water, which alters the tissue magnetization and the image intensity creating a "tag" image. This process is repeated without magnetically labeling the arterial blood water, thus creating a "control" image. Subtracting the control and tag images produces the perfusion imaging which reflects the amount of arterial blood delivered to each voxel within the region of interest, termed difference signal. At the Pre-intervention assessment and 12-weeks following at the Post intervention assessment
Secondary Cerebrovascular reactivity (CVR) using a hypercapnic CO2 response test change CVR will be assessed using 5% CO2 challenge while continuously acquiring MR images. This method has been extensively used and is the most suitable vasoactive stimulus.33,34 Briefly, the CO2 air (5% CO2, 21% O2 and 74% N2) will be administered via an air bag with a valve to switch between room air and CO2 air in the bag. A mouth piece and a nose clip will be used to achieve mouth-only breathing. A research staff member will be inside the magnet room throughout the experiment to switch the valve and to monitor the subject. Physiologic parameters, including end-tidal (Et) CO2 and breathing rate will be monitored and recorded during the experiments. At the Pre-intervention assessment and 12-weeks following at the Post intervention assessment
See also
  Status Clinical Trial Phase
Completed NCT05433233 - Effects of Lifestyle Walking on Blood Pressure in Older Adults With Hypertension N/A
Recruiting NCT06032065 - Sequential Multiple Assessment Randomized Trial of Exercise for PAD: SMART Exercise for PAD (SMART PAD) Phase 3
Completed NCT05293730 - Trial of the Impact of the Electronic Frailty Integrated With Social Needs N/A
Recruiting NCT03932162 - Gene Expression Changes In Young and Geriatric Skin Early Phase 1
Completed NCT04064528 - Effects of Age on Amino Acid Delivery to Tendon N/A
Completed NCT03366129 - Blood-Brain Barrier Disruption in People With White Matter Hyperintensities Who Have Had a Stroke
Completed NCT06029920 - Influence of Overground Walking on Biomarkers, Cognitive Function, and Quality of Life in Elderly With Mild Cognitive Impairment N/A
Recruiting NCT05543980 - Leg Heat Therapy in Elderly Individuals Phase 2
Recruiting NCT05566938 - Study to Design a Precision Nutrition Strategy at a Group Level in the Elderly N/A
Completed NCT04894929 - Comprehensive Geriatric Assessment in the Monitoring of Functional Improvement N/A
Not yet recruiting NCT06071130 - Emotion, Aging, and Decision Making N/A
Enrolling by invitation NCT04641663 - Multi-target Dietary Supplement Tolerability in an Aging Population (MTDSST) N/A
Completed NCT04088006 - The Evaluation of Efficacy and Safety of Hyaluronic Acid Injection on Skin Moisturization and Elasticity N/A
Completed NCT03695081 - Patient Pathway Pharmacist - Optimal Drug-related Care N/A
Recruiting NCT05424263 - Acetate and Age-associated Arterial Dysfunction Phase 2
Completed NCT05601713 - Mitigating Heat-induced Physiological Strain and Discomfort in Older Adults Via Lower Limb Immersion and Neck Cooling N/A
Completed NCT04551339 - Zinc Versus Multivitamin Micronutrient Supplementation in the Setting of COVID-19 N/A
Recruiting NCT04997577 - Speech Perception and High Cognitive Demand N/A
Completed NCT05922475 - Efficacy of Pre-sleep or Post-exercise Protein During 12 Weeks of Resistance Exercise Training N/A
Completed NCT04015479 - Peanut Protein Supplementation to Augment Muscle Growth and Improve Markers of Muscle Quality and Health in Older Adults N/A