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Social, Contextual, and Environmental Determinants of Physical Activity in Sedentary Minority Adults

25 Years
60 Years
Open (Enrolling)
Cancer, Prevention Harmful Effects

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Trial Information

Social, Contextual, and Environmental Determinants of Physical Activity in Sedentary Minority Adults

If you chose to take part in this study, you will receive an exercise program, a pedometer,
access to a social networking site, and newsletters to help you start becoming more
physically active. A pedometer is a small device worn on the hip that counts the number of
steps you have taken each day.

Study Visits:

You will come in for study visits 6 times while you are on study; 1 time at the beginning of
the study called "screening", 1 time for an orientation visit 7 days after the screening
visit, and for follow-up visits at 8, 26, 39, and 52 weeks after you begin the exercise

Baseline Tests:

If you are found to be eligible to take part on this study based on the results of the
screening tests, the following tests and procedures will be performed:

- You will be asked to complete a computer-based survey. The questionnaires will ask
questions about stress, your motivation for physical activity, any social support you
may receive from others, the neighborhood you live in, and other physical
activity-related topics. The questionnaires should take about 2 hours total to

- Your blood pressure will be measured.

- Your height, weight, and waistline will be measured. To measure your waistline
accurately, you may be asked to lift your shirt to expose your stomach area and to
lower your pants to expose your mid-hip area. Waistline measurements will only take
about 10 minutes to complete and will be performed in a private area.

- You will complete a fitness test. To complete the fitness test, you will either walk a
circular path at the clinic for 6 minutes or complete a step test. The study staff
will decide which test you will complete and will discuss the test with you in more
detail. A study staff member will monitor you during this test.

Study Devices:

At the baseline visit, you will be given the following study devices:

- You will be given a smartphone to take home with you.

- You will fill out a set of questions on the smartphone each time you exercise. The
questions will ask about the kind physical activity you are participating in, the
location of where the physical activity is taking place, and the weather conditions
outside. These questions will take about 1-2 minutes per day. Also, the smartphone
will "beep" at random times (3 times per day) and set times (in the morning and
evening) throughout the day to prompt you to answer a set of questions about your
thoughts and feelings. The device will also automatically record your location using a
Global Positioning System (GPS) during the time you are carrying the phone. This will
take about 7-8 minutes per day. The research staff will call you 1 time each week to
remind you to use the smartphone and will help with any smartphone problems that may
occur. Each reminder phone call should last about 3 minutes. You will return the
smartphone with you at the orientation visit for the study staff to download your

- You will be given an accelerometer. You will wear the accelerometer for 7 days and
then return it at the orientation study visit. An accelerometer is a small device that
is worn on your hip that measures the amount of physical activity you do.

Orientation Study Visit:

At the orientation study visit, the following tests and procedures will be performed:

- You will be given a newsletter that contains information and strategies to help you
start your exercise program.

- You will be given a smartphone again to take home.

- You will be given a physical activity (PA) prescription. The PA prescription outlines
your exercise program and has instructions on the proper way to walk to decrease the
chance of getting an injury. You will be instructed to start your PA prescription and
carry the smartphone with you for 2 weeks. After 2weeks, you will return the
smartphone by mail in a prepaid envelope that will be provided to you by the study

- You will be given a pedometer to wear when you are ready to start your PA prescription.

Weeks 8, 26, 39, and 52 Study Visits

For each of these study visits, the following tests and procedures will be performed:

- You will return the accelerometer at each visit for the study staff to review, and you
will take it home at the end of each visit. The staff member will provide you with the
device at your Week 8 visit and you will receive an envelope for return. The smartphone
will also be given to you at Weeks 26 and 39, and you will be required to mail it back.
For Week 52 you will receive the device 1 week before and return it at your Week 52
visit. You should tell a research staff member right away about any problems you may
have using the smartphone.

- You will complete the computer-based survey.

- Your blood pressure will be measured.

- Your height, weight, and waistline will be measured.

You will receive phone calls between study visits to remind you to complete the questions on
the smartphone.

At the Weeks 26 and 52 study visits, in addition to the tests and procedures listed above,
you will complete the fitness test again and return the smartphone.

Length of Study:

You will remain in the study for up to 1 year. Your participation on this study will be
over after you complete the study visit at Week 52.

Inclusion Criteria:

1. Black or Latino (self-defined by participant) ages 25-60 years

2. Currently sedentary, defined as self-reported physical activity of week over the past 6 months

3. Ready and physically able to start being physically active. Determined by asking
participant if they intend to start being physically active within the next 30 days.

4. Have a home address where information can be mailed

5. Able to read English at a 6th grade level as assessed by the REALM

6. If uncontrolled hypertension or other physical limitations that might be aggravated
by participation in lifestyle moderate-intensity physical activity as determined by
PA Readiness Questionnaire (PAR-Q). Participants with BP readings >/=140/90mm Hg,
will have to provide a doctors note or medical clearance.

7. Live within Harris County

Exclusion Criteria:

1. Pregnant or thinking about becoming pregnant during the study period

2. Another person in the same household is enrolled in the study

3. Physical limitation that prevents engaging in PA

4. MD Anderson employees who work in the Division of Cancer Prevention and Population

Type of Study:


Study Design:

Observational Model: Cohort, Time Perspective: Prospective

Outcome Measure:

Participant Physical Activity Outcome

Outcome Description:

Physical Activity (PA) outcome measured at four time points post baseline (weeks 8, 26, 39, and 52)

Outcome Time Frame:

1 year

Safety Issue:


Principal Investigator

Lorna H. McNeill, PHD, MPH

Investigator Role:

Principal Investigator

Investigator Affiliation:

UT MD Anderson Cancer Center


United States: Institutional Review Board

Study ID:




Start Date:

August 2010

Completion Date:

Related Keywords:

  • Cancer
  • Prevention Harmful Effects
  • Sedentary minority adult
  • Psychosocial factors
  • Environmental factors
  • Obesity
  • Physical Activity
  • PA
  • Cancer Risk
  • African Americans
  • Latino



UT MD Anderson Cancer Center Houston, Texas  77030