Acute Aerobic Exercise & Neuroplasticity in Depression

Status Completed

Clinical Trial Summary

Depression is associated with a disruption in the mechanisms that regulate neuroplasticity. Effective treatment and rehabilitation of depression, and other neurological and neuropsychiatric disorders, relies on neuroplasticity. Thus, identifying therapies that enhance neuroplasticity (neuroplastic adaptation) are vital in the comprehensive treatment of depression. Aerobic exercise training has been demonstrated to have antidepressant properties and single bouts of aerobic exercise may provide short-term improvements in affective states in depression. Furthermore, acute aerobic exercise may enhance the response to known neuroplasticity-inducing paradigms. However, it is unclear if aerobic exercise can influence neuroplasticity in depression and the neurobiological mechanisms underlying acute neuroplastic changes are not well understood in depressed and healthy cohorts. Thus, the purpose of this project is to examine the acute effects of aerobic exercise on neuroplastic, neurobiological, and mood indices of depression.

Clinical Trial Description

The investigators will determine the effects of exercising at two different intensities (compared to a control non-exercise condition) on neuroplastic potential in depressed and non-depressed subjects. To accomplish this aim, the investigators will have subjects ride a cycle ergometer at intensities set to elicit 35% (low) and 70% (high) of heart rate reserve (((220 - age) - resting heart rate) x 35% or 70%) + resting heart rate). Prior to, and immediately after exercise participants will have their neuroplastic potential tested via transcranial magnetic stimulation (TMS), blood specimens sampled, and mood changes assessed (methods detailed below). These assessments will occur at these time points and then every 15 minutes for 1 hour after exercise.

Neuroplastic potential will be assessed using TMS. TMS-induced motor evoked potentials (MEP's) will be recorded from the abductor pollicis brevis as a way to measure changes in the excitability of the corticospinal tract in response to exercise and paired associative stimulation. Serum brain-derived neurotrophic factor (BDNF) and cortisol levels will be obtained through blood specimen samples in order to examine the potential exercise-induced changes in known stress- and neuroplasticity-related biomarkers. Mood and affect will be surveyed using the Activation-Deactivation Checklist (AD ACL), feeling scale (FS), and felt arousal scale (FAS). These measures will permit the assessment of exercise-induced changes in mood and affect. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT02839837
Study type	Interventional
Source	Medical University of South Carolina
Contact
Status	Completed
Phase	N/A
Start date	May 2016
Completion date	December 2018

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

Acute Aerobic Exercise and Neuroplasticity in Depression

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms