Acute Effects of Exercise in Smokers With Schizophrenia

Brown University

Status and phase: Completed; Phase 2

Conditions: Tobacco Dependence; Smoking Behavior; Cigarette Craving

Treatments: Behavioral: Exercise; Behavioral: passive control

Study type: Interventional

Funder types: Other

Identifiers

NCT01635075

1R21DA031283

Details and patient eligibility

About

People with schizophrenia have two- to three-times the mortality risk of the general population. This is primarily due to their unusually high rates of cigarette smoking, as well as other cardiovascular risk factors such as physical inactivity, obesity, high blood cholesterol and diabetes. Effective smoking treatments are needed to reduce morbidity and mortality in this population. Over a dozen experimental studies indicate that walking and other forms of exercise acutely reduce cigarette craving, nicotine withdrawal symptoms and smoking behavior in non-psychiatric smokers. However, the effects of acute exercise on smoking measures have not been studied in smokers with schizophrenia. This study will use a within-subjects, repeated-measures design, in which participants will undergo 4 laboratory sessions (order counterbalanced across participants): (1) smoking cues followed by exercise, (2) smoking cues followed by passive activity, (3) neutral cues followed by exercise, (4) neutral cues followed by passive activity. Outcome measures include cigarette craving, nicotine withdrawal symptoms, mood and smoking behavior. If the results of this study indicate that walking acutely reduces craving and smoking in smokers with schizophrenia, the next step in this research would be to test the effectiveness of a smoking cessation intervention that incorporates exercise bouts as a behavioral strategy for improving smoking cessation rates in this population.

Enrollment: 30 patients

Sex: All

Ages: 18 to 60 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• diagnosis of schizophrenia
• smoke at least 20 cigarettes per day
• less than 60 min moderate-intensity exercise per week

Exclusion criteria

• medication changes in past 4 weeks
• unable to give informed consent to participate
• alcohol/drug screen
• pregnant or nursing
• receiving or seeking immediate smoking treatment

Trial design

Primary purpose: Basic Science

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: Single Blind

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30 participants in 2 patient groups, including a placebo group

Exercise

Experimental group

Description:

1-mile treadmill walk

Treatment:

Behavioral: Exercise

Passive

Placebo Comparator group

Description:

20 min inactivity

Treatment:

Behavioral: passive control