The CHAT (Community Health Advice by Telephone) Study

Not Recruiting

Trial ID: NCT00131092


The purpose of the study is to compare a telephone-administered physical activity counseling program delivered by a person or by a telephone-linked computer system and test their relative benefits in improving regular physical activity among adults ages 55 and older.

Official Title

Exercise Advice by Human or Computer: Testing 2 Theories

Stanford Investigator(s)


Inclusion Criteria:

   - Men and women ages 55 and older

   - Free of any medical condition that would limit participation in independent exercise

   - Not currently engaged in a regular pattern of physical conditioning

   - Free of clinical psychopathology

   - Stable on current medications

   - Planning to remain in the geographic area through the duration of the trial

   - Able to read and speak English sufficiently to understand protocol materials

   - Can use the telephone unaided

   - Willing to accept random assignment to any study condition

Exclusion Criteria:

   - Under the age of 55

   - Currently under treatment for an acute, serious medical condition (e.g., cancer, heart
   disease, stroke)

   - Physically active on a regular basis (i.e. performing more than 60 minutes per week of
   aerobic physical activity of at least a moderate intensity)

   - Unstable and/or uncontrolled on medications for high blood pressure or depression

   - Unable or unwilling to use a telephone unaided

   - Unwilling to accept random assignment to study condition


behavioral: The Stanford Active Choices program

behavioral: The TLC system

Not Recruiting

Contact Information

Stanford University
School of Medicine
300 Pasteur Drive
Stanford, CA 94305