@Article{info:doi/10.2196/jmir.9.2.e7,
author="Hurling, Robert
and Catt, Michael
and De Boni, Marco
and Fairley, Bruce William
and Hurst, Tina
and Murray, Peter
and Richardson, Alannah
and Sodhi, Jaspreet Singh",
title="Using Internet and Mobile Phone Technology to Deliver an Automated Physical Activity Program: Randomized Controlled Trial",
journal="J Med Internet Res",
year="2007",
month="Apr",
day="27",
volume="9",
number="2",
pages="e7",
keywords="Behavior change; Health behavior; Behavior therapy; Obesity prevention; Health promotion; Exercise; Cellular phone; Internet; Consumer health informatics; Randomized controlled trial",
abstract="Background:  The Internet has potential as a medium for health behavior change programs, but no controlled studies have yet evaluated the impact of a fully automated physical activity intervention over several months with real-time objective feedback from a monitor. Objective:  The aim was to evaluate the impact of a physical activity program based on the Internet and mobile phone technology provided to individuals for 9 weeks. Methods:  A single-center, randomized, stratified controlled trial was conducted from September to December 2005 in Bedfordshire, United Kingdom, with 77 healthy adults whose mean age was 40.4 years (SD = 7.6) and mean body mass index was 26.3 (SD = 3.4). Participants were randomized to a test group that had access to an Internet and mobile phone--based physical activity program (n = 47) or to a control group (n = 30) that received no support. The test group received tailored solutions for perceived barriers, a schedule to plan weekly exercise sessions with mobile phone and email reminders, a message board to share their experiences with others, and feedback on their level of physical activity. Both groups were issued a wrist-worn accelerometer to monitor their level of physical activity; only the test group received real-time feedback via the Internet. The main outcome measures were accelerometer data and self-report of physical activity. Results:  At the end of the study period, the test group reported a significantly greater increase over baseline than did the control group for perceived control (P < .001) and intention/expectation to exercise (P < .001). Intent-to-treat analyses of both the accelerometer data (P = .02) and leisure time self-report data (P = .03) found a higher level of moderate physical activity in the test group. The average increase (over the control group) in accelerometer-measured moderate physical activity was 2 h 18 min per week. The test group also lost more percent body fat than the control group (test group: −2.18, SD = 0.59; control group: −0.17, SD = 0.81; P = .04). Conclusions:  A fully automated Internet and mobile phone--based motivation and action support system can significantly increase and maintain the level of physical activity in healthy adults. ",
issn="1438-8871",
doi="10.2196/jmir.9.2.e7",
url="http://www.jmir.org/2007/2/e7/",
url="https://doi.org/10.2196/jmir.9.2.e7",
url="http://www.ncbi.nlm.nih.gov/pubmed/17478409"
}