tDCS for Increasing Exercise Adherence in Depressed Individuals

Not Applicable

Completed

Conditions: Depression
Physical Activity

Interventions: Other: Sham tDCS
Other: tDCS
Behavioral: Aerobic Exercise (AE)

Registration Number: NCT03178903

Lead Sponsor: Butler Hospital

Brief Summary: The purpose of this study is to examine the efficacy of tDCS (transcranial direct current stimulation) for increasing exercise adherence among low active individuals with elevated depressive symptoms. The investigators expect that this project will contribute much needed knowledge about the role that tDCS can play in changing the affective experience of exercise.

Detailed Description: Exercise adherence is a significant public health problem. Affective experiences during exercise predict long-term physical activity (PA) levels. Therefore, approaches to improving the affective experience of exercise are both important and likely to have high impact. This may be particularly true among individuals with elevated depressive symptoms due to their tendency toward more negative and less positive affect. tDCS is a noninvasive brain stimulation approach with a growing body of literature supporting its effects on cognitive and emotional processing in varied populations, including some support for those with depression. In addition, there is recent increased interest in utilizing tDCS in the context of exercise (see above) and in obesity prevention. While the effects of tDCS on behavioral and cognitive functioning are still developing, promising findings have emerged for tDCS used in repeated combination with a behavioral or cognitive intervention. Given that tDCS is relatively safe, inexpensive, and portable, individuals who struggle with enjoying exercise could be afforded a practical option for increasing and maintaining physical activity levels.

We propose to conduct a pilot randomized controlled trial of tDCS versus sham delivered 3x/week for 8 weeks in the context of a supervised aerobic exercise (AE) program among 72 low-active individuals with elevated depressive symptoms. Follow-up assessments will be conducted at end of treatment, 3, and 6 months.

Recruitment & Eligibility

Status: COMPLETED

Sex: All

Target Recruitment: 51

Inclusion Criteria

be between 18 and 65 years of age
be low active
have elevated levels of depressive symptoms
interested in starting an exercise program in the next month

Exclusion Criteria

history of mania or hypomania
current psychotic disorder
current DSM-5 diagnosis of an eating disorder
DSM-5 moderate and severe substance use disorder
current suicidality or homicidality
current DSM-5 diagnosis of major depressive disorder that is not currently being treated with pharmacotherapy or psychotherapy
physical disabilities or medical problems that would prevent participation in moderate intensity exercise or may be contraindicated for tDCS
current pregnancy or intent to become pregnant during the next 8 weeks
pacemaker or metal implanted in the cranial cavity

Study & Design

Study Type: INTERVENTIONAL

Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Sham tDCS and Aerobic Exercise	Sham tDCS	Each participant will undergo a 20-minute session of sham transcranial direct current stimulation (tDCS) delivered to the dorsolateral prefrontal cortex (DLPFC). Each session of tDCS will be immediately followed by a supervised 30-minute, moderate-intensity bout of exercise. These procedures will occur 3x/week for 8 weeks.
tDCS and Aerobic Exercise	Aerobic Exercise (AE)	Each participant will undergo a 20-minute session of transcranial direct current stimulation (tDCS) delivered to the dorsolateral prefrontal cortex (DLPFC). Each session of tDCS will be immediately followed by a supervised 30-minute, moderate-intensity bout of exercise. These procedures will occur 3x/week for 8 weeks.
tDCS and Aerobic Exercise	tDCS	Each participant will undergo a 20-minute session of transcranial direct current stimulation (tDCS) delivered to the dorsolateral prefrontal cortex (DLPFC). Each session of tDCS will be immediately followed by a supervised 30-minute, moderate-intensity bout of exercise. These procedures will occur 3x/week for 8 weeks.
Sham tDCS and Aerobic Exercise	Aerobic Exercise (AE)	Each participant will undergo a 20-minute session of sham transcranial direct current stimulation (tDCS) delivered to the dorsolateral prefrontal cortex (DLPFC). Each session of tDCS will be immediately followed by a supervised 30-minute, moderate-intensity bout of exercise. These procedures will occur 3x/week for 8 weeks.