Acute Effects of Exercise in Smokers With Schizophrenia

September 25, 2015 updated by: Jennifer Tidey, Brown University
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.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

30

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Rhode Island
      • Providence, Rhode Island, United States, 02912
        • Brown University

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 60 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

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

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Basic Science
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Exercise
1-mile treadmill walk
Behavioral: Exercise
1-mile treadmill walk
Placebo Comparator: Passive
20 min inactivity
Behavioral: passive control
20 min inactivity

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Cigarette craving
Time Frame: within 10 minutes before and after exercise (or control activity)
Questionnaire on Smoking Urges - Brief form
within 10 minutes before and after exercise (or control activity)

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Mood
Time Frame: within 10 minutes before and after exercise (or control activity)
Positive and Negative Affect Scales, which are brief questionnaire measures of positive and negative mood.
within 10 minutes before and after exercise (or control activity)
Smoking habit withdrawal
Time Frame: within 10 minutes before and after exercise (or control activity)
Questionnaire measures of withdrawal from sensorimotor aspects of smoking
within 10 minutes before and after exercise (or control activity)
Smoking choice
Time Frame: initiated 10 minutes after exercise (or control activity)
2-hr laboratory smoking choice assessment in which participants make a series of choices between smoking versus receiving a small amount of cash.
initiated 10 minutes after exercise (or control activity)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Brown University

Investigators

  • Principal Investigator: Jennifer Tidey, Ph.D., Brown University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

June 1, 2012

Primary Completion (Actual)

January 1, 2015

Study Completion (Actual)

January 1, 2015

Study Registration Dates

First Submitted

June 19, 2012

First Submitted That Met QC Criteria

July 3, 2012

First Posted (Estimate)

July 6, 2012

Study Record Updates

Last Update Posted (Estimate)

September 28, 2015

Last Update Submitted That Met QC Criteria

September 25, 2015

Last Verified

September 1, 2015

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 1R21DA031283 (U.S. NIH Grant/Contract)

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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