The Deep South IVR-based Active Lifestyle Study

60 participants will receive the DIAL intervention or Wait List Control. While main outcomes
are focused on feasibility and acceptability, physical activity, fitness, and body weight and
composition data will be collected and measured at baselines and 12-weeks.

DIAL Intervention: The physical activity intervention is based on Social Cognitive Theory and
emphasizes behavioral strategies for increasing activity levels (i.e., goal setting,
self-monitoring, problem solving barriers, increasing social support, rewarding oneself for
meeting physical activity goals) and includes daily activity reporting via an Individual
Voice Response (IVR) system that allows computer-assisted interaction with participants by
telephone. Computer expert system feedback on physical activity progress will be based on
participants' reported daily step counts and >moderate intensity PA . In addition to IVR
system feedback, participants will receive monthly graphic-based feedback letters delivered
by mail. Messages will encourage incremental increases until national PA guidelines are
reached and provide specific information on cancer risk reduction ("In the past 7 days, you
called the DIAL study line all 7 days and reported engaging in 80 minutes of moderate
intensity PA. The national guidelines call for >150 min/week of moderate intensity PA so you
are well on your way. Keep up the good work. Make small increases in PA each week until you
reach that goal. Remember: 30-60 min/day of moderate-vigorous intensity PA may significantly
lower your risk of breast and colon cancer").

To improve self-efficacy, social support, outcome expectations, and perceived enjoyment, we
will assess these variables at baseline, 30, 60, and 90 days. Responses will be used to
select appropriate tailored feedback modules (for low self-efficacy score, "You do not seem
confident about your ability to exercise. Often trying to fit in some PA on top of the
demands of work and family can be a challenge. Try making time for a 10 minute walk 1-2 days
this week. It will help build confidence about your ability to fit PA into your lifestyle.")
Finally, participants will receive access to problem solving modules, addressing PA barriers
identified by the community during formative research (lack of time, negative outcome
expectations, enjoyment, social support, see table below). Module options will be rotated and
constantly updated to keep participants engaged.

Wait List Control Condition: Will receive the intervention after 12 weeks following baseline
assessments.

Inclusion Criteria:

- 21 years or older

- Underactive (<60 min/week moderate PA)

- Able to speak/read English

- Willing to be assigned to either condition

- Access to a telephone

- Not planning to move from the area in the next 4 months

- Healthy (BMI 18.5-45; No history of heart disease, myocardial infarction, angina,
stroke, or orthopedic conditions which limit mobility, or any serious medical
condition that would make physical activity unsafe; no psychiatric hospitalization in
past 3 years).