Pilot Study of the Impact of Exercise on Hippocampal Function

Study Overview
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Brief Summary
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The goal of this pilot study is to test the procedural aspects of the behavioral tests and the exercise components of the study. This includes establishing typical scores for anxiety patients in these behavioral tests, and administering and coaching anxiety patients in an at-home exercise regimen. This pilot study will produce the information necessary to design a larger future study including both patients and healthy control participants.

Detailed Description
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This is a pilot study to explore whether High Intensity Interval Training (HIIT) aerobic exercise can improve performance on hippocampal dependent behaviors or anxiety measures . HIIT is a form of interval training that alternates short periods of high effort exercise with less intense recovery periods. Participants in this study will undertake a 6-week protocol of HIIT exercise, performed at home on a portable stepper device. Outcome measures for this study will be performance on two hippocampus-dependent behaviors and responses to mood and anxiety questionnaires. The hippocampus is a brain structure that is involved in learning and memory, and is one of the two sites of adult neurogenesis, the process of generating of new neurons from stem cells in the adult mammalian brain. Adult neurogenesis may represent a new target for the treatment of anxiety disorders. The tests in this study consist of a picture-based memory task and a location memory task. Eligible participants will complete both game tasks. In each test, participants will sit in front of a computer and play these games using the computer keyboard or a handheld video game controller.

Official Title
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Pilot Study of the Impact of Exercise on Hippocampal Behavior

Conditions
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Anxiety

Intervention / Treatment
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* Behavioral: High Intensity Interval Exercise


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: A primary diagnosis of Obsessive Compulsive Disorder (OCD), Social Anxiety Disorder (SAD), Generalized Anxiety Disorder (GAD), Panic Disorder (PD), and/or Specific Phobia (SP) No use of psychiatric medication in the past 4 weeks (or 8 weeks for fluoxetine) Age 18-40 Ability to tolerate a treatment-free period English-speaking Body Mass Index (BMI) within normal range Willing and able to sign consent form and comply with study procedures Exclusion Criteria: Current or lifetime comorbid psychiatric conditions that significantly elevate the risk of study participation Any major medical or neurological problem that might interfere with reliable performance of study tasks or their interpretation, or render participation dangerous Pregnant or lactating Use of medication that alters the brain Clinical symptom severity warranting immediate treatment Current rigorous exercise program Participation in Cognitive Behavioral Therapy (CBT) psychotherapy for anxiety

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 40 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: High Intensity Interval Exercise<br>home exercise sessions | Behavioral: High Intensity Interval Exercise<br>* 6 week at-home aerobic exercise protocol<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in Percent Correct Score for the Treasure Hunt Task (THT) | change between baseline and 6 weeks | 6 weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in Percent Correct Score for the Mnemonic Similarity Test (MST) | change between baseline and 6 weeks | 6 weeks | 
| Change in Depression, Anxiety, and Stress Scale (DASS) | change in self-report questionnaire score between baseline and 6 weeks | 6 weeks | 
| Change in Intolerance of Uncertainty Scale (IUS) | change in self-report questionnaire score between baseline and 6 weeks | 6 weeks | 
| Change in Baecke Physical Activity Questionnaire | change in self-report questionnaire score between baseline and 6 weeks | 6 weeks | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Aerobic Exercise, Neurogenesis, Memory, Spatial Processing, Hippocampus, Cognition