%0 Journal Article
%@ 1438-8871
%I JMIR Publications
%V 20
%N 5
%P e170
%T Web-Based Physical Activity Intervention for Latina Adolescents: Feasibility, Acceptability, and Potential Efficacy of the Niñas Saludables Study
%A Larsen,Britta
%A Benitez,Tanya
%A Cano,Mayra
%A Dunsiger,Shira S
%A Marcus,Bess H
%A Mendoza-Vasconez,Andrea
%A Sallis,James F
%A Zive,Michelle
%+ Department of Family Medicine & Public Health, University of California, San Diego, 9500 Gilman Drive, San Diego, CA, 92093 0725, United States, 1 8585348429, blarsen@ucsd.edu
%K exercise
%K health behavior
%K internet
%K eHealth
%K telemedicine
%D 2018
%7 09.05.2018
%9 Original Paper
%J J Med Internet Res
%G English
%X Background: Physical activity is markedly low in Latina adolescents, yet few physical activity interventions have been attempted in this population. Web-based interventions can incorporate theory-based components, be appealing to adolescents, and have potential for low-cost dissemination. Objective: This study aimed to assess the feasibility, acceptability, and potential efficacy of a Web-based physical activity intervention for Latina adolescents in a single-arm pilot trial. Methods: A total of 21 Latina adolescents (aged 12-18 years) who could read and write in English and were underactive (<90 min/week) participated in a 12-week, theory-informed Web-based physical activity intervention. The intervention website was modified from a previous Web-based intervention for Latina adults. Web content was individually tailored based on the responses to monthly questionnaires. Feasibility was measured by recruitment, retention, and adherence/engagement, and acceptability was measured by satisfaction surveys. Physical activity was measured at baseline and follow-up (12 weeks) using the 7-day physical activity recall (PAR) interview and accelerometers. Results: Baseline activity as measured by the 7-day PAR and accelerometers was 24.7 (SD 26.11) and 24.8 (SD 38.3) min/week, respectively. At 12 weeks, 19 participants (90%, 19/21) returned. Adherence and engagement with materials were low, but 72% (15/21) of the participants indicated that they were satisfied with the intervention. Activity at 12 weeks increased by 58.8 (SD 11.33) min/week measured by the 7-day PAR (P<.001). Accelerometer-measured activity did not increase. Activities reported at follow-up were more varied than at baseline, including some activities measured poorly by accelerometers (eg, biking and swimming). Participants suggested simplifying the website and incorporating other technologies. Conclusions: Good retention and increases in self-reported activity suggest a promising approach to delivering a physical activity intervention to Latina adolescents. Incorporating other technologies, such as smartphone apps, could make the intervention more engaging, acceptable, and effective. 
%M 29743151
%R 10.2196/jmir.9206
%U http://www.jmir.org/2018/5/e170/
%U https://doi.org/10.2196/jmir.9206
%U http://www.ncbi.nlm.nih.gov/pubmed/29743151