Exercise to Augment TMS in Those With Treatment Resistant Depression

NCT ID: NCT05913401

Last Updated: 2025-05-14

Basic Information

• Recruitment Status: ACTIVE_NOT_RECRUITING
• Clinical Phase: NA
• Total Enrollment: 30 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2024-02-01
• Study Completion Date: 2025-12-31

Brief Summary

Given the growing evidence that aerobic increases cortical excitability and promotes neuroplasticity, the scientific premise for its potential priming effect on the brain is strong. Combining AE with rTMS may produce a neural environment optimized for a robust physiological effect of rTMS, thereby leading to improved depression outcomes. With positive findings, this study would provide preliminary support for an innovative, safe and feasible approach for improving outcomes for this significant public health problem.

Detailed Description

Depression is highly prevalent and a significant public health concern, resulting in tremendous economic and societal burden. With first-line treatments leaving the majority of patients with unremitted and impairing symptomatology, additional therapies to address treatment-resistant depression (TRD) are critical. One such approach that has received significant empirical attention is repetitive transcranial magnetic stimulation (rTMS). While effective in reducing depression, rTMS's efficacy is not without limits, with remission rates being less than 40%. Therefore, research focused on improving the efficacy of rTMS is timely and critical for decreasing the overall public health burden of TRD. A putative mechanism of the effect of rTMS on depression is through changes in electrophysiological properties of neurons leading to increases in long-term potentiation (LTP) necessary for neuroplasticity. In theory, it may be possible to improve rTMS outcomes by augmenting it with another non-pharmacological treatment known to influence neuroplasticity. One innovative possibility could be aerobic exercise (AE), as it has shown to result in increased neuroplasticity in both animal and human studies and is known to reduce depression. There are a number of neural effects of AE that could serve to prime the brain for rTMS including increased prefrontal oxygenation and increased brain-derived neurotropic factor (BDNF, involved in inducing LTP). Conceivably, bouts of AE just prior to rTMS sessions may create a neural environment that is broadly primed for the more focally delivered TMS, potentially increasing its effectiveness. To date, there have been no studies that have combined AE with rTMS. Therefore, the purpose of the proposed study is to conduct the first test of AE priming among treatment-resistant depressed individuals seeking rTMS treatment. We expect that AE will improve the efficacy of rTMS through changes in exercise-induced neuroplasticity via measurements of motor-evoked potential (MEP). Exercise studies have shown single bouts of aerobic activity can result in increased MEP amplitudes and chronic AE (i.e., multi-sessions) decreases resting motor thresholds (RMT; the lowest intensity of TMS that evokes a MEP), thereby increasing overall cortical excitability. For the proposed pilot study, we will recruit N=30 patients with treatment-resistant depression who are seeking rTMS treatment at Butler Hospital's TMS Clinic. Participants will be randomized to engage in one of two different activities just prior to their scheduled daily TMS treatments: 1) 20 minutes of supervised moderate-intensity AE on an on-site treadmill (n=15) OR 2) 20-minutes of watching an educational video (n=15) while sitting. To examine indicators of neuroplasticity, a TMS cortical excitability protocol (assessing plasticity through measuring MEPs generated by single and paired magnetic pulses) will be conducted at baseline (prior to initiating the course of rTMS) and then again after 30 rTMS treatment sessions. At these same timepoints, depression severity will be measured using the Inventory of Depressive Symptomatology-Self Report scale (IDS-SR). The feasibility and acceptability of the combined AE+TMS approach will also be examined to inform the design of a future larger trial.

Conditions

Treatment Resistant Depression

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Aerobic Exercise

Exercise sessions will be 20 minutes of moderate-intensity aerobic exercise on a treadmill. A treadmill is located on D1A within the space shared by the Butler Hospital TMS Clinic and the COBRE-support Neuromodulation Research Facility. A research staff member will monitor their heart rate and blood pressure to ensure safety and that activity is occurring at a moderate intensity (i.e., 64-76% of age predicted maximal heart rate). Participants will be asked to rate their affect and rating of perceived exertion (RPE) during exercise sessions. Sessions will include a 5-min warm-up and a 5-min cool-down to ensure safe exercise procedures. Participants will be asked to answer questions about affect before, during, and after exercise. These sessions will be supervised (i.e., they provide onsite coverage) by an exercise physiologist or medical staff member (e.g., nurse or physician) to ensure safety.

Group Type: EXPERIMENTAL

Aerobic Exercise

Intervention Type: BEHAVIORAL

20 minutes of supervised aerobic exercise on a treadmill prior to each TMS session

Video Condition

In this condition, participants will be asked to sit and watch various documentaries or educational videos on topics NOT related to physical activity. These will last approximately 20 minutes and will occur before each TMS session.

Group Type: OTHER

Video Watching

Intervention Type: BEHAVIORAL

20 minutes of watching documentaries or educational videos prior to each TMS session

Interventions

Aerobic Exercise

20 minutes of supervised aerobic exercise on a treadmill prior to each TMS session

Intervention Type: BEHAVIORAL

Video Watching

20 minutes of watching documentaries or educational videos prior to each TMS session

Intervention Type: BEHAVIORAL

Eligibility Criteria

Inclusion Criteria

• adult outpatients (age 18 and above) who are already approved to receive standard TMS therapy through the Butler Hospital TMS clinic.
• able to safely engage in moderate-intensity aerobic exercise (determined by a study physician)

Exclusion Criteria

• Currently pregnant or plans to become pregnant in the next 6 weeks

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

National Institute of General Medical Sciences (NIGMS)

NIH

Sponsor Role: collaborator

Butler Hospital

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

Butler Hospital

Providence, Rhode Island, United States

Countries

United States

Other Identifiers

P20GM130452

Identifier Type: NIH

Identifier Source: secondary_id

View Link

2304-001

Identifier Type: -

Identifier Source: org_study_id