Dose Response Study of Aerobic Exercise in Older Adults

This study has been completed.
Information provided by (Responsible Party):
Jeff Burns, MD, University of Kansas Medical Center Research Institute Identifier:
First received: May 18, 2010
Last updated: April 14, 2014
Last verified: April 2014
This is a randomized, 26-week study of supervised exercise assessing three doses of exercise in sedentary individuals 65 years of age and over with age-related cognitive changes. A total of 100 subjects (n=25 in each of four groups) will be randomized to a non-aerobic control group, 75 minutes, 150 minutes, or 225 minutes a week of moderate intensity aerobic exercise spread over 3 to 5 days a week for 26 weeks. These exercise doses represent 50%, 100%, or 150% of the recommended exercise dose. Participants will be directly supervised during all exercise sessions for the first two months after which direct supervision will occur during at least one session a week. This is intended to provide increased flexibility while also maintaining direct contact with the participant to enhance adherence. Aerobic fitness, physical function, and cognition will be assessed at baseline and 26 weeks to examine the dose-response relationships. At 52 weeks, cognition will be reassessed to examine durability of cognitive changes.

Condition Intervention Phase
Alzheimer's Disease
Behavioral: Nonexercise control group
Behavioral: Aerobic Exercise Group 1
Behavioral: Aerobic Exercise Group 2
Behavioral: Aerobic Exercise Group 3
Phase 0

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Dose Response Study of Exercise for Age-related Cognitive Changes

Resource links provided by NLM:

Further study details as provided by University of Kansas Medical Center:

Primary Outcome Measures:
  • Primary Cognitive Outcome Measure: General Cognition [ Time Frame: baseline, 26 , and 52 ] [ Designated as safety issue: No ]
    We predict that general cognition will be enhanced by the aerobic exercise intervention. Greater cognitive gains will be made by individuals with more fitness gains. Finally, the intervention will affect all cognitive domains but it will affect executive functioning domains relatively more than other domains.

Secondary Outcome Measures:
  • Secondary Outcomes will measure memory [ Time Frame: baseline, 26 , and 52 ] [ Designated as safety issue: No ]
    Tests selected consistently yield moderate to large sized exercise-related effects across many studies and possess good ecological validity when aggregated by cognitive domain.

Enrollment: 101
Study Start Date: May 2010
Study Completion Date: April 2014
Primary Completion Date: February 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Nonexercise control group Behavioral: Nonexercise control group
Participants randomized to the nonexercise control group will be asked to maintain their current level of physical activity during the 26-week active study period. They will perform outcome assessments and receive the same telephone checks as the exercise group at baseline, 26 and 52 weeks. The purpose of including a non-exercise control group is to allow adequate comparisons with the low, medium and high exercise dose groups on changes in cognitive and physiologic outcome measures.
Experimental: Aerobic Exercise Group 1 Behavioral: Aerobic Exercise Group 1
The 50% group will perform 75 minutes a week of moderate intensity exercise spread over 3 days.
Experimental: Aerobic Exercise Group 2 Behavioral: Aerobic Exercise Group 2
The 100% group will perform 150 minutes a week of exercise over 3 - 5 days
Experimental: Aerobic Exercise Group 3 Behavioral: Aerobic Exercise Group 3
The 150% group will perform 225 minutes a week of exercise over 4 - 5 days.


Ages Eligible for Study:   65 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Informed consent
  • Age 65 years or older
  • Underactive or sedentary based on the Telephone Assessment of Physical Activity
  • Community dwelling with a caregiver willing to accompany the participant to visits to the screening evaluation. The caregiver must visit with the subject more than five times a week.
  • Nondemented: CDR 0
  • Adequate visual and auditory abilities to perform all aspects of the cognitive and functional assessments
  • Stable doses of medications for at least 30 days prior to screening.
  • Likely to participate in all scheduled evaluations and complete the exercise program over 52 weeks

Exclusion Criteria:

  • Dementia
  • CDR > 0
  • Current clinically significant major psychiatric disorder (e.g., Major Depressive Disorder) according to DSM-IV criteria or Geriatric Depression score of 5 or greater.
  • Significant psychiatric symptoms (e.g., hallucinations) that could impair the completion of the study
  • Current clinically-significant systemic illness likely to result in deterioration of the patient's condition or affect the patient's safety during the study
  • History of clinically-evident stroke
  • Clinically-significant infection within the last 30 days
  • Myocardial infarction or symptoms of coronary artery disease (e.g., angina) in the last two-years.
  • Uncontrolled hypertension within the last 6 months
  • History of cancer within the last 5 years (except non-metastatic basal or squamous cell carcinoma)
  • History of drug or alcohol abuse as defined by DSM-IV criteria within the last 2 years
  • Insulin-dependent diabetes mellitus
  • Significant pain or musculoskeletal disorder that would prohibit participation in an exercise program
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01129115

United States, Kansas
University of Kansas Medical Center
Kansas City, Kansas, United States, 66160
Sponsors and Collaborators
Jeff Burns, MD
Principal Investigator: Jeffrey Burns, MD University of Kansas Medical Center
  More Information

No publications provided by University of Kansas Medical Center

Additional publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Jeff Burns, MD, Assistant Professor, Director of the Alzheimer & Memory Center & AD Clinical Research Program, University of Kansas Medical Center Research Institute Identifier: NCT01129115     History of Changes
Other Study ID Numbers: 11883 
Study First Received: May 18, 2010
Last Updated: April 14, 2014
Health Authority: United States: Institutional Review Board

Additional relevant MeSH terms:
Alzheimer Disease
Brain Diseases
Central Nervous System Diseases
Delirium, Dementia, Amnestic, Cognitive Disorders
Mental Disorders
Nervous System Diseases
Neurodegenerative Diseases
Tauopathies processed this record on February 09, 2016