The goal of this clinical trial is to test how exercise affects learning and memory processes relevant to the treatment of PTSD. Participants will complete a baseline intake followed by two experimental sessions. During the first experimental session, participants will undergo an MRI session of imaginal exposure to traumatic memory cues followed by 30-minutes of moderate intensity exercise or low intensity exercise. Participants will complete a second session of imaginal exposure with MRI 24 hours later.
The proposed project would build on our published pilot data and animal models to demonstrate that moderate intensity physical exercise delivered after exposure therapy engages fear circuitry and enhances the consolidation of therapeutic safety learning, thereby enabling enhanced symptom reduction for PTSD. Adults with PTSD related to interpersonal violence (IPV) exposure would complete an initial session of imaginal exposure to traumatic memory cues adapted for an MRI setting. This would be followed by 30-mins of moderate intensity exercise or low intensity exercise control. Participants would return 24-hrs later to complete a second session of imaginal exposure with MRI.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
100
Participants will wear a heartrate monitor and cycle on a stationary bike at a slow speed for 5 minutes, then slowly cycle on a stationary bike for 30 minutes, then cycle on the stationary bike at a slow speed for 5 minutes.
Participants will wear a heartrate monitor and cycle on a stationary bike at a slow speed for 40 minutes.
University of Kentucky
Lexington, Kentucky, United States
RECRUITINGUniversity of Texas
Austin, Texas, United States
RECRUITINGChange in participant subjective emotional ratings
Participant anxiety will be measured at baseline and after each imagery trial using a 10-point Likert-type scale with higher scores indicative of more subjective anxiety.
Time frame: 24 hours
Change in Heart Rate
Participant heart rate will be measured at baseline and after each imagery trial using a Biopac MP160 system
Time frame: 24 hours
Change in Fear Circuit Blood Oxygen Level-Dependent (BOLD) Response
Blood Oxygen Level-Dependent (BOLD) imaging will be measured during each imagery trial
Time frame: 48 hours
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