Background: Web-based interventions are popular for promoting healthy lifestyles such as
physical activity. However, little is known about user characteristics, adherence, attrition, and …

Background: Effective interventions are needed to reduce the chronic disease epidemic. The
Internet has the potential to provide large populations with individual advice at relatively low …

OBJECTIVE: To better understand the mixed findings regarding the efficacy of Internet-
based physical activity interventions, we examined the use and usefulness of particular …

Background Despite many advantages of web-based health behavior interventions such as
wide accessibility or low costs, these interventions are often accompanied by high attrition …

Background: Nowadays people are extensively encouraged to become more physically
active. The Internet has been brought forward as an effective tool to change physical activity …

Background The translation of Web-based physical activity intervention research into the
real world is lacking and becoming increasingly important. Objective To compare usage and …

Background Data from controlled trials indicate that Web-based interventions generally
suffer from low engagement and high attrition. This is important because the level of …

Background: In randomized controlled trials, participants cannot choose their preferred
intervention delivery mode and thus might refuse to participate or not engage fully if …

Background Web-based interventions show promise in promoting a healthy lifestyle, but
their effectiveness is hampered by high rates of nonusage. Predictors and reasons for (non) …

Background: Effectiveness of and engagement with website-delivered physical activity
interventions is moderate at best. Increased exposure to Internet interventions is reported to …