Effect of Exercises Training in Patients With Mild Cognitive Impairment and Early Alzheimer's Disease

NCT ID: NCT02074215

Last Updated: 2014-02-28

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

19 participants

Study Classification

INTERVENTIONAL

Study Start Date

2011-03-31

Study Completion Date

2013-12-31

Brief Summary

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Recent studies have shown that aerobic exercises and dual-task training are effective in improving overall cognitive function in patients with cognitive impairment or dementia. However, the biological mechanisms are unknown in humans. It also remains unclear regarding whether carrying APOEε4 genotype or not would influence the effects. Therefore, the three main purposes of this study are: (1) to investigate the effects of a 3-month aerobic exercises combined with dual-task training on memory and executive cognitive functions in patients with mild cognitive impairment (MCI) and in those with early Alzheimer's disease (AD); (2) to compare the differences in training effects between patients who carry APOEε4 genotype and those who do not carry this genotype; and (3) to investigate the biological mechanisms of the exercise training effects on memory and executive cognitive function in these patients. The biological mechanisms of interest will include the blood Aβ1-40 and Aβ1-42 level, insulin, fasting glucose, cytokine, integrity of brain fiber tracts, and cerebral blood flow.

We will conduct a randomized controlled clinical trial. A total of 70 patients with MCI or AD will be recruited. The participants will be randomly assigned to the experimental group or the control group. Both groups will receive three 90-minute exercise sessions per week for 12 weeks. For the experimental group, the exercise program will include moderate intensity aerobic exercises and dual-task training; whereas for the control group, the training program will include gentle stretching exercises. Both groups will receive examinations on outcome variables, including blood Aβ1-40 and Aβ1-42 level, insulin, fasting glucose, cytokine,integrity of brain fiber tracts, cerebral blood flow, cognitive function, and dual task performance at baseline, post-training, and after a 3-month follow-up period. Differences on the aforementioned outcomes brought by the 12-week training programs will be compared between the experimental and control groups. Exercise effects between patients who carry APOEε4 genotype and those who do not will also be examined.

Results of this study will provide relevant clinical evidence for the effects of aerobic exercises combined with dual-task training on patients with MCI and mild AD; and will provide further understanding of the mechanisms mediating these effects.

Detailed Description

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Recent studies have shown that moderate-to-high intensity aerobic exercises are effective in improving overall cognitive function in patients with cognitive impairment or dementia. Dual-task training programs also show positive effects on enhancing executive function in patients with cognitive impairment. However, the biological mechanisms through which these training effects are mediated remain largely unknown in humans. It also remains unclear regarding whether carrying APOEε4 genotype or not would influence the effects of aerobic exercises and dual-task training on cognitive function of these patients. Therefore, the three main purposes of this study are:

1. to investigate the effects of a 3-month aerobic exercises combined with dual-task training on memory and executive cognitive functions in patients with mild cognitive impairment (MCI) and in those with early Alzheimer's disease (AD);
2. to compare the differences in training effects between patients who carry APOEε4 genotype and those who do not carry this genotype; and
3. to investigate the biological mechanisms of the exercise training effects on memory and executive cognitive function in these patients. The biological mechanisms of interest will include the blood Aβ1-40 and Aβ1-42 level, insulin, fasting glucose, cytokine (TNF-α, Interleukin(IL) -Iβ, IL-6, CRP),integrity of brain fiber tracts, and cerebral blood flow.

We will conduct a single-blind (assessor blinded) randomized controlled clinical trial. A total of 70 patients with MCI or AD will be recruited. The participants will be randomly assigned to the experimental group or the control group using stratified randomization by matching patient's diagnosis. Both groups will receive one health education session and three 90-minute exercise sessions per week for 12 weeks. For the experimental group, the exercise program will include moderate intensity aerobic exercises and dual-task training; whereas for the control group, the training program will include gentle stretching exercises and activities in sitting of mild intensity. Both groups will receive examinations on outcome variables, including blood Aβ1-40 and Aβ1-42 level, insulin, fasting glucose, cytokine (TNF-α, IL-Iβ, IL-6, CRP),integrity of brain fiber tracts, cerebral blood flow, cognitive function, and dual task performance at baseline, post-training, and after a 3-month follow-up period. Differences on the aforementioned outcomes brought by the 12-week training programs will be compared between the experimental and control groups using two-way (group x time) repeated measures of ANOVA. Intercorrelations among the changes in these outcomes will be analyzed to explore the possible biological mechanisms mediating the training effects. Exercise effects between patients who carry APOEε4 genotype and those who do not will also be examined.

Results of this study will provide relevant clinical evidence for the effects of aerobic exercises combined with dual-task training on patients with MCI and mild AD; and will provide further understanding of the mechanisms mediating these effects.

Conditions

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Alzheimer's Disease

Keywords

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Mild Cognitive Impairment Alzheimer's disease Aerobic exercise

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Outcome Assessors

Study Groups

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Aerobic exercises

90-minute exercise sessions per week for 12 weeks

Group Type EXPERIMENTAL

Aerobic exercises

Intervention Type OTHER

Aerobic exercises + dual task

Stretch exercise

90-minute exercise sessions per week for 12 weeks

Group Type ACTIVE_COMPARATOR

Stretch exercise

Intervention Type OTHER

Stretch exercise

Interventions

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Aerobic exercises

Aerobic exercises + dual task

Intervention Type OTHER

Stretch exercise

Stretch exercise

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* mild cognitive impairment or mild AD.

Exclusion Criteria

* neurological disorders or psychiatric disorders, or any other systematic diseases that would affect their walking ability
Minimum Eligible Age

60 Years

Maximum Eligible Age

90 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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National Taiwan University Hospital

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Ming-Jang Chiu, PhD

Role: STUDY_CHAIR

National Taiwan University Hospital

Locations

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National Taiwan University Hospital

Taipei, , Taiwan

Site Status

Countries

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Taiwan

Other Identifiers

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201012136RB

Identifier Type: -

Identifier Source: org_study_id