Skip to main content
Grant Details

Grant Number: 5R01CA159954-02 Interpret this number
Primary Investigator: Marcus, Bess
Organization: University Of California San Diego
Project Title: Promoting Physical Activity in Latinas Via Interactive Web-Based Technology
Fiscal Year: 2012
Back to top


DESCRIPTION (provided by applicant): In the U.S., Latino women (Latinas) report higher rates of inactivity than their non-Hispanic White and male counterparts and thus are disproportionately burdened by related health conditions (e.g., cancer, hypertension, heart disease, stroke, diabetes). Cultural factors, socioeconomic circumstances, language and educational barriers limit Latinas access to public health interventions that promote physically active lifestyles. To address this public health crisis, effective interventions that leverage state-of-the-art theory and methods are needed to reach this at-risk population. Our research group has over 20 years experience developing and evaluating individually-tailored, computer expert system-driven, physical activity interventions (based on Social Cognitive Theory and the Transtheoretical Model) through various channels and settings. In our recent pilot (R21NR009864), we culturally and linguistically adapted our tailored intervention for sedentary Latinas and conducted a small randomized trial of the modified program (N=93). A total of 81 participants completed the 6- month study (87 percent retention) and increased their physical activity from a mean of 17 minutes per week (SD=25.76) at baseline to 147 minutes (SD=241.55) at six months whereas contact control participants increased their physical activity from 12 minutes per week (SD=21.99) at baseline to 97 minutes (SD=118.49) at six months. These observed improvements in physical activity in our intervention group, along with high retention rates, participant-reported desire for an Internet-delivered program, and formative work developing our program in an Internet format lend support for testing an Internet intervention tailored to the needs of Latinas. Therefore, for the current application, we will build on our previous work by conducting an adequately powered (N=200) randomized controlled trial to test the efficacy of our culturally and linguistically modified, individually tailored physical activity intervention delivered via the Internet relative to an Internet wellness contact control condition (including cardiovascular health information developed for Latinos by the NHLBI). Data will be collected at baseline, 6 months (post-treatment), and 12 months (maintenance) using well- established physical activity measures (7-Day PAR, Actigraphs), as well as a comprehensive set of psychosocial questionnaires. We hypothesize that at end of treatment (month six) intervention participants will report significantly more minutes of moderate intensity physical activity per week than the wellness contact control participants. We will also examine the maintenance of treatment effects at 12 months, potential mediators and moderators of the intervention-physical activity relationship, and the costs of delivering the tailored Internet program. In the proposed study we seek to promote physical activity among an underserved population using a high-reach, low-cost, technology-based strategy, which has great potential for adoption on a larger scale and thus high potential for reducing health disparities in the U.S.

Back to top


A Web-based Physical Activity Intervention For Spanish-speaking Latinas: A Costs And Cost-effectiveness Analysis
Authors: Larsen B. , Marcus B. , Pekmezi D. , Hartman S. , Gilmer T. .
Source: Journal Of Medical Internet Research, 2017-02-22 00:00:00.0; 19(2), p. e43.
PMID: 28228368
Related Citations

Physical Activity Maintenance Among Spanish-speaking Latinas In A Randomized Controlled Trial Of An Internet-based Intervention
Authors: Hartman S.J. , Dunsiger S.I. , Bock B.C. , Larsen B.A. , Linke S. , Pekmezi D. , Marquez B. , Gans K.M. , Mendoza-Vasconez A.S. , Marcus B.H. .
Source: Journal Of Behavioral Medicine, 2016-10-17 00:00:00.0; , .
PMID: 27752866
Related Citations

Pasos Hacia La Salud: a randomized controlled trial of an internet-delivered physical activity intervention for Latinas.
Authors: Marcus B.H. , Hartman S.J. , Larsen B.A. , Pekmezi D. , Dunsiger S.I. , Linke S. , Marquez B. , Gans K.M. , Bock B.C. , Mendoza-Vasconez A.S. , et al. .
Source: The International Journal Of Behavioral Nutrition And Physical Activity, 2016-05-28 00:00:00.0; 13, p. 62.
EPub date: 2016-05-28 00:00:00.0.
PMID: 27234302
Related Citations

Content and perception of weight-related maternal messages communicated to adult daughters.
Authors: Marquez B. .
Source: Eating And Weight Disorders : Ewd, 2015 Sep; 20(3), p. 345-53.
PMID: 25481054
Related Citations

Using Interactive Internet Technology To Promote Physical Activity In Latinas: Rationale, Design, And Baseline Findings Of Pasos Hacia La Salud
Authors: Marcus B.H. , Hartman S.J. , Pekmezi D. , Dunsiger S.I. , Linke S. , Marquez B. , Gans K.M. , Bock B.C. , Larsen B.A. , Rojas C. .
Source: Contemporary Clinical Trials, 2015-08-05 00:00:00.0; , .
PMID: 26255237
Related Citations

Using Web-Based Technology to Promote Physical Activity in Latinas: Results of the Muévete Alabama Pilot Study.
Authors: Benitez T.J. , Cherrington A.L. , Joseph R.P. , Keller C. , Marcus B. , Meneses K. , Marquez B. , Pekmezi D. .
Source: Computers, Informatics, Nursing : Cin, 2015 Jul; 33(7), p. 315-24.
PMID: 26049367
Related Citations

Association of fish oil supplement use with preservation of brain volume and cognitive function.
Authors: Daiello L.A. , Gongvatana A. , Dunsiger S. , Cohen R.A. , Ott B.R. , Alzheimer's Disease Neuroimaging Initiative .
Source: Alzheimer's & Dementia : The Journal Of The Alzheimer's Association, 2015 Feb; 11(2), p. 226-35.
PMID: 24954371
Related Citations

Back to Top