Impaired Glucose TolerancePhase 2NCT00220441
Cognitive Effects of Aerobic Exercise for IGT Adults
A Phase 2 study testing Aerobic exercise in people with Impaired Glucose Tolerance, run by Seattle Institute for Biomedical and Clinical Research at 2 sites in United States.
Trial summary
The specific aims for the study will be to determine if aerobic exercise enhances cognition for older adults who are at risk for developing type II diabetes mellitus (T2DM), and to evaluate whether change in insulin sensitivity predicts cognitive performance for subjects randomized to the aerobic exercise group. Read more about this study
- Who is it for?
- Ages 55 to 90 yearsHealthy volunteers can take part
- Conditions the study is for
- Impaired Glucose Tolerance
- What is being tested?
- Aerobic exercise
- Type of treatment
- Lifestyle or therapy programme
- How many people
- 40 participants
- Where
- 2 sitesUnited States
- Study dates
- Jul 2004to Apr 2008
- Phase
- Phase 2
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 55 to 90 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- diagnosed with IGT using OGTT, at least 55 years old, sedentary (elevated HR \& SOB < 3x/wk for <30min each occasion), good overall health, willing to exercise at least 4 days/week for 6 mos
Who cannot join
- Significant neurologic disease that might affect cognition, such as AD, stroke, Parkinson's disease, multiple sclerosis, or severe head injury with loss of consciousness; significant medical illness or organ failure, such as liver disease, significant elevations in liver function tests, kidney disease, and uncontrolled hypertension (BP > 140/90 on medication); cardiovascular disease defined as any acute cardiovascular abnormality, such as new or unstable angina, uncontrolled irregular heart beat (treated a-fib and occasional PVC's are OK) or symptomatic heart failure, acute shortness of breath for any reason, or clinically significant edema; chronic lung disease, (COPD/emphysema); musculoskeletal impairment (impaired walking); current use of anti-psychotic, anti-convulsant, anti-coagulant, sedative medication, or cognition-enhancing medications; current or previous use of hypoglycemic agents or insulin.
Trial locations and contacts
2 sites in 1 country.
United States2 sites
Veterans Affairs Puget Sound Health Care System
Seattle, Washington, 98108
Veterans Affairs Puget Sound Health Care System
Tacoma, Washington, 98493
About this study
Official title: Cognitive Effects of Aerobic Exercise for Adults With Impaired Glucose Tolerance: A Controlled Trial
The specific aims for the study will be to determine if aerobic exercise enhances cognition for older adults who are at risk for developing type II diabetes mellitus (T2DM), and to evaluate whether change in insulin sensitivity predicts cognitive performance for subjects randomized to the aerobic exercise group. Sedentary older adults diagnosed with impaired glucose tolerance using an oral glucose tolerance test will participate in a 6-month supervised protocol of either aerobic exercise or stretching. Cognitive testing and blood collection will occur at baseline, and months 3 and 6. Before and after the 6-month intervention, insulin sensitivity, maximum aerobic capacity, and body fat composition and distribution (via CT scan) will be assessed for all subjects. The results of this study may provide support for a relatively simple and inexpensive treatment strategy that specifically targets many of the health factors that directly influence risk of cognitive decline associated with T2DM for older adults.
Read the detailed description
The benefits of exercise on cognition have been demonstrated both in animals and humans. Exercise has salutary effects on glucoregulation and visceral adiposity, an important link for adults with impaired glucose tolerance (IGT) and type 2 diabetes mellitus (T2DM). Exercise also upregulates neurotrophic activity, an effect that serves to increase neuronal viability in the same brain regions that support complex cognitive functions affected by metabolic disease. In this proposed controlled intervention trial, the hypothesis is that aerobic exercise will have a beneficial effect on cognition and several biomarkers that index disease progression for older adults with IGT. 40 older subjects (age: >55 yrs) with IGT, confirmed by OGTT, will be randomized to an aerobic fitness or stretching program for 6 months. Cognitive measures and fasting blood samples will be obtained at baseline, month 3, and month 6. Cognitive tests will evaluate abilities affected by age and by significant glucoregulatory dysregulation. In addition, all subjects will undergo a hyperinsulinemic-euglycemic clamp protocol, a cardiopulmonary fitness assessment, and body fat quantification procedures, immediately before and after the intervention. The specific aims of the study will be to determine if aerobic exercise enhances cognition for older adults with IGT, to evaluate whether exercise-induced change in insulin sensitivity predicts cognitive performance, and to relate exercise effects on insulin sensitivity and cognition to changes in specified biomarkers. The results of this study may provide support for a relatively simple and inexpensive treatment strategy that targets many of the health factors that influence risk of cognitive decline.
- Conditions
- Impaired Glucose Tolerance
- Being tested
- Aerobic exercise
- Keywords
- IGT, exercise, cognition, insulin, aging, aerobic
- Medical subject headings
- Glucose Intolerance, Motor Activity, Insulin Resistance
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Aerobic exerciseBehavioural
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in cognitive scores
Change in insulin sensitivity
Secondary outcomes (2)
Change in biomarkers assayed from blood
Correlation between cognitive scores, insulin sensitivity, biomarkers
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted22 Sep 2005 (estimated)
- Study startJul 2004
- Primary completionDec 2007
- Study completionApr 2008
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for Impaired Glucose ToleranceStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Enrolment
- 40 participants
Sponsor and investigators
- Lead sponsor
- Seattle Institute for Biomedical and Clinical Research
- Sponsor type
- University, hospital or other
- Collaborators
- American Diabetes Association
- Investigators
- Laura D. Baker, PhD, Principal investigator, VA Puget Sound Health Care System; University of Washington
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00220441
- Sponsor's protocol ID
- RDIS 0009
- Other IDs
- ADA BL19 (SIBCR)
- Status last verified
- Jul 2008
- First submitted
- 21 Sep 2005
- Last updated
- 30 Jul 2008
- Results posted
- No
- Data monitoring committee
- No
Publications
Baker LD, Frank LL, Foster-Schubert K, Green PS, Wilkinson CW, McTiernan A, Cholerton BA, Plymate SR, Fishel MA, Watson GS, Duncan GE, Mehta PD, Craft S. Aerobic exercise improves cognition for older adults with glucose intolerance, a risk factor for Alzheimer's disease. J Alzheimers Dis. 2010;22(2):569-79. doi: 10.3233/JAD-2010-100768.
PubMed 20847403
Study at a glance
From the registry record, last updated by the sponsor on 30 Jul 2008. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Cognitive Effects of Aerobic Exercise for Adults With Impaired Glucose Tolerance: A Controlled Trial
- ClinicalTrials.gov ID
- NCT00220441
- Acronym / sponsor ID
- RDIS 0009
- Conditions
- Impaired Glucose Tolerance
- Keywords
- IGT, exercise, cognition, insulin, aging, aerobic
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 40 participants
- Lead sponsor
- Seattle Institute for Biomedical and Clinical ResearchUniversity, hospital or other
- Collaborators
- American Diabetes Association
- Study start
- Jul 2004
- Primary completion
- Dec 2007 (actual)
- Study completion
- Apr 2008 (actual)
- First posted
- 22 Sep 2005 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The specific aims for the study will be to determine if aerobic exercise enhances cognition for older adults who are at risk for developing type II diabetes mellitus (T2DM), and to evaluate whether change in insulin sensitivity predicts cognitive performance for subjects randomized to the aerobic exercise group. Sedentary older adults diagnosed with impaired glucose tolerance using an oral glucose tolerance test will participate in a 6-month supervised protocol of either aerobic exercise or stretching. Cognitive testing and blood collection will occur at baseline, and months 3 and 6. Before and after the 6-month intervention, insulin sensitivity, maximum aerobic capacity, and body fat composition and distribution (via CT scan) will be assessed for all subjects. The results of this study may provide support for a relatively simple and inexpensive treatment strategy that specifically targets many of the health factors that directly influence risk of cognitive decline associated with T2DM for older adults.
Detailed description
The benefits of exercise on cognition have been demonstrated both in animals and humans. Exercise has salutary effects on glucoregulation and visceral adiposity, an important link for adults with impaired glucose tolerance (IGT) and type 2 diabetes mellitus (T2DM). Exercise also upregulates neurotrophic activity, an effect that serves to increase neuronal viability in the same brain regions that support complex cognitive functions affected by metabolic disease. In this proposed controlled intervention trial, the hypothesis is that aerobic exercise will have a beneficial effect on cognition and several biomarkers that index disease progression for older adults with IGT. 40 older subjects (age: >55 yrs) with IGT, confirmed by OGTT, will be randomized to an aerobic fitness or stretching program for 6 months. Cognitive measures and fasting blood samples will be obtained at baseline, month 3, and month 6. Cognitive tests will evaluate abilities affected by age and by significant glucoregulatory dysregulation. In addition, all subjects will undergo a hyperinsulinemic-euglycemic clamp protocol, a cardiopulmonary fitness assessment, and body fat quantification procedures, immediately before and after the intervention. The specific aims of the study will be to determine if aerobic exercise enhances cognition for older adults with IGT, to evaluate whether exercise-induced change in insulin sensitivity predicts cognitive performance, and to relate exercise effects on insulin sensitivity and cognition to changes in specified biomarkers. The results of this study may provide support for a relatively simple and inexpensive treatment strategy that targets many of the health factors that influence risk of cognitive decline.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
Who may qualify
- Ages
- 55 to 90 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- diagnosed with IGT using OGTT, at least 55 years old, sedentary (elevated HR \& SOB < 3x/wk for <30min each occasion), good overall health, willing to exercise at least 4 days/week for 6 mos
Key exclusion criteria (1 listed)
- Significant neurologic disease that might affect cognition, such as AD, stroke, Parkinson's disease, multiple sclerosis, or severe head injury with loss of consciousness; significant medical illness or organ failure, such as liver disease, significant elevations in liver function tests, kidney disease, and uncontrolled hypertension (BP > 140/90 on medication); cardiovascular disease defined as any acute cardiovascular abnormality, such as new or unstable angina, uncontrolled irregular heart beat (treated a-fib and occasional PVC's are OK) or symptomatic heart failure, acute shortness of breath for any reason, or clinically significant edema; chronic lung disease, (COPD/emphysema); musculoskeletal impairment (impaired walking); current use of anti-psychotic, anti-convulsant, anti-coagulant, sedative medication, or cognition-enhancing medications; current or previous use of hypoglycemic agents or insulin.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Aerobic exercise | Behavioural | – |
Primary outcome
Change in cognitive scores
Change in insulin sensitivity
2 secondary outcomes
Change in biomarkers assayed from blood
Correlation between cognitive scores, insulin sensitivity, biomarkers
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 30 Jul 2008.
- Derived from this study: PubMed 20847403Baker LD, Frank LL, Foster-Schubert K, Green PS, Wilkinson CW, McTiernan A, Cholerton BA, Plymate SR, Fishel MA, Watson GS, Duncan GE, Mehta PD, Craft S. Aerobic exercise improves cognition for older adults with glucose intolerance, a risk factor for Alzheimer's disease. J Alzheimers Dis. 2010;22(2):569-79. doi: 10.3233/JAD-2010-100768.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Laura D. Baker, PhD principal investigator
VA Puget Sound Health Care System; University of Washington
2 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing Aerobic exercise in people with Impaired Glucose Tolerance, run by Seattle Institute for Biomedical and Clinical Research at 2 sites in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 30 Jul 2008. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 2 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in cognitive scores. The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00220441, which also lists 1 linked publication.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 30 Jul 2008.