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BACKGROUND Smart Walk is a culturally relevant, social cognitive theory-based, smartphone-delivered intervention designed to increase physical activity (PA) and reduce cardiometabolic disease risk among African American (AA) women. OBJECTIVE This study aimed to describe the development and initial usability testing results of Smart Walk. METHODS Smart Walk was developed in 5 phases. Phases 1 to 3 focused on initial intervention development, phase 4 involved usability testing, and phase 5 included intervention refinement based on usability testing results. In phase 1, a series of 9 focus groups with 25 AA women (mean age 38.5 years, SD 7.8; mean BMI 39.4 kg/m2, SD 7.3) was used to identify cultural factors associated with PA and ascertain how constructs of social cognitive theory can be leveraged in the design of a PA intervention. Phase 2 included the analysis of phase 1 qualitative data and development of the structured PA intervention. Phase 3 focused on the technical development of the smartphone app used , cultural relevance, and impact of the smartphone-delivered PA intervention. ©Rodney P P Joseph, Colleen Keller, Sonia Vega-López, Marc A Adams, Rebekah English, Kevin Hollingshead, Steven P Hooker, Michael Todd, Glenn A Gaesser, Barbara E Ainsworth. Originally published in JMIR mHealth and uHealth (http//mhealth.jmir.org), 02.03.2020.BACKGROUND The Netherlands, like most European countries, has a robust influenza surveillance system in primary care. However, there is a lack of real-time nationally representative data on hospital admissions for complications of influenza. Anecdotal information about hospital capacity problems during influenza epidemics can, therefore, not be substantiated. OBJECTIVE The aim of this study was to assess whether media reports could provide relevant information for estimating the impact of influenza on hospital capacity, in the absence of hospital surveillance data. METHODS Dutch news articles on influenza in hospitals during the influenza season (week 40 of 2017 until week 20 of 2018) were searched in a Web-based media monitoring program (Coosto). Trends in the number of weekly articles were compared with trends in 5 different influenza surveillance systems. A content analysis was performed on a selection of news articles, and information on the hospital, department, problem, and preventive or response measurg. ©Daphne FM Reukers, Sierk D Marbus, Hella Smit, Peter Schneeberger, Gé Donker, Wim van der Hoek, Arianne B van Gageldonk-Lafeber. Originally published in JMIR Public Health and Surveillance (http//publichealth.jmir.org), 04.03.2020.BACKGROUND The uptake of pre-exposure prophylaxis (PrEP) has been slow for young black men who have sex with men (BMSM) living in the southern United States. learn more This is a significant issue because 8 of the 10 states with the highest rates of new HIV infections are in the South. Jackson, Mississippi (MS), the site of this project, has the second highest AIDS diagnosis rate in the nation and the highest rate of HIV infection for young, urban BMSM. This study will develop and test an engaging, interactive, and cost-effective mobile messaging intervention to improve engagement in PrEP care for BMSM aged 18 to 35 years living in Jackson, MS. OBJECTIVE The goals of this mixed methods study are to (1) conduct qualitative interviews with young BMSM in Jackson, MS, to understand individual, community, and structural barriers affecting engagement in PrEP-related care, (2) assemble a PrEP mobile messaging intervention that includes text messages with publicly available internet content (websites and YouTube videos) that primprove information about PrEP, improve motivation to use PrEP, and decrease stigma and structural barriers that often prevent engagement in PrEP-related medical care. TRIAL REGISTRATION ClinicalTrials.gov NCT03308097; https//clinicaltrials.gov/ct2/show/NCT03308097. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID) DERR1-10.2196/15781. ©Anne-Emilie B. Rouffiac, Laura Whiteley, Larry Brown, Leandro Mena, Lacey Craker, Meredith Healy, Kayla Haubrick. Originally published in JMIR Research Protocols (http//www.researchprotocols.org), 20.02.2020.[This corrects the article DOI 10.2196/15488.]. ©Jonas Müller, Stephan Nowak, Antje Vogelgesang, Bettina von Sarnowski, Eiko Rathmann, Sein Schmidt, Sebastian Rehberg, Taras Usichenko, Harry Kertscho, Klaus Hahnenkamp, Agnes Flöel, Henry WS Schroeder, Jan-Uwe Müller, Robert Fleischmann. Originally published in JMIR Research Protocols (http//www.researchprotocols.org), 28.02.2020.BACKGROUND Obesity is among the most significant health challenges facing today's adolescents. Weight gain during adolescence is related to cardiovascular disease, type 2 diabetes, and some cancers in later life. Presently, adolescents living in Australia have limited access to age-appropriate obesity prevention services. OBJECTIVE This study aims to investigate whether a two-way text message program, with optional telephone health counseling, improves body mass index (BMI) z score and lifestyle outcomes in adolescents who are overweight. METHODS This study will be a single-blind randomized controlled trial (N=150) comparing a two-way text message intervention, with optional telephone health counseling, to usual care in adolescents (13-18 years old, inclusive) who are overweight (recruited from a pediatric weight management clinic and the broader community in Sydney, Australia). The intervention group will receive a six-month text message program, which consists of two-way, semipersonalized, lifestyle-focusedONCLUSIONS This study will test the effectiveness of an interactive two-way text message program compared to usual care in improving BMI z score and lifestyle outcomes in adolescents with overweight. This interactive, innovative, and scalable project also aims to inform future practice and community initiatives to promote obesity prevention behaviors for adolescents. TRIAL REGISTRATION Australia New Zealand Clinical Trials Registry (ANZCTR) ACTRN12619000389101; https//www.anzctr.org.au/Trial/Registration/TrialReview.aspx?id=377158&isReview=true. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID) DERR1-10.2196/16481. ©Stephanie R Ruth Partridge, Rebecca Raeside, Anna C Singleton, Karice Hyun, Zoe Latham, Alicia Grunseit, Katharine Steinbeck, Clara Chow, Julie Redfern. Originally published in JMIR Research Protocols (http//www.researchprotocols.org), 18.02.2020.