Increasing Physical Activity Among Mexican American Women (The Enlace Study)

Mexican American women in the United States are more likely to live a sedentary lifestyle
than women of other ethnic groups. As a result, obesity affects Mexican American women at a
high rate. Obesity and a lack of physical activity are risk factors for many diseases,
including heart disease, diabetes, and certain types of cancers. Increasing physical
activity can lead to weight loss and lower the risk of developing these diseases. This study
represents a partnership between the University of South Carolina, the South Carolina
Hispanic Latino Health Coalition, and the University of Texas Health Sciences Center at San
Antonio (UTHSCSA) Regional Academic Health Center in the Lower Rio Grande Valley of Texas.
Study researchers from these institutions will first conduct interviews and focus groups and
then develop a program aimed at encouraging moderately intense physical activity among
Mexican American women. Next, the study will evaluate the effectiveness of that program at
increasing physical activity levels and promoting weight loss among Mexican American women
in Columbia, South Carolina and the Lower Rio Grande Valley of Texas.

This study will enroll Mexican American women. Participants will be randomly assigned to
either immediately take part in the physical activity program or take part in the program at
the end of the 6-month study. At baseline, all participants will receive home visits from
study staff. During these visits, participants will undergo weight, height, and waist
measurements. Participants will also complete questionnaires to assess their medical history
and physical activity habits. For 1 week after the study visit, participants will wear a
physical activity monitor and keep an activity diary. Participants who are assigned to
immediately take part in the physical activity program will receive counseling from a
community health educator that will focus on the importance of changing physical activity
habits. They will be encouraged to partake in 30 minutes of daily physical activity for at
least 5 days a week. Each month, participants will receive educational materials and
telephone calls or visits from the health educator. Participants will receive a pedometer
and will be asked to keep a daily log of their physical activity. At Month 6, all
participants will receive another home study visit for repeat baseline testing. At this
time, participants who did not take part initially in the physical activity program will
start the program. However, they will have no further study visits or evaluations.

Inclusion Criteria:

- Self-identifies as being of Mexican origin

- Has a personal telephone

- Resides in the study area and intends to stay in the area for the entire study period

- Able to understand Spanish

- Does not currently meet physical activity level recommendations

- Interested in receiving information on physical activity

- Willing to be assigned to either study group

- Willing to attend the program sessions and complete standardized measurements

Exclusion Criteria:

- Not physically able to participate in a moderate intensity walking program and not
able to understand and verbally respond to questions

- Pregnant

- Diabetes

- Uncontrolled hypertension

- Undergoing therapy for life-threatening illnesses (e.g., chemotherapy or radiation
therapy)

- Positive (risk) responses on the Physical Activity Readiness Questionnaire (PAR-Q)
and subsequent physician disapproval on the Physical Activity Readiness Medical
Examination (PAR-Med-X)

- Already gets 5 or more days per week of 30 minutes of moderately intense activity,
based on the responses to the six questions concerning frequency and duration of
moderately and vigorously intense physical activity from the Behavioral Risk Factor
Surveillance Survey