MPOWERed Messages: Tailored Mobile Messages to Enhance Weight Loss for Teens

For this trial adolescents will be allowed to use their own phone (with reimbursement for any study-related costs), or will be provided with a mobile phone, if requested. Participants will receive messages delivered daily over the course of 20 weeks. The content of the messages will be tailored on participants' responses to the MPOWER enrollment survey and the initial tailoring questionnaire. On school days, all messages will be sent after 3 pm (which is after school hours for most Michigan middle and high schools). Therefore, patients will not need to carry cell phones to school. The tailored messages will utilize various degrees of personalization, adaptation and feedback - including momentary assessments with feedback requiring a text reply from the adolescents.