Background: Commercial off-the-shelf activity trackers (eg, Fitbit) allow users to self-monitor
their daily physical activity (PA), including the number of steps, type of PA, amount of sleep …

A global target of the World Health Organization (WHO) is to reduce physical inactivity
among all adults and adolescents by approximately fifteen percent by 2030. Social media …

As the popularity and diversity of social media platforms increases so does their utility for
health research. Using social media for recruitment into clinical studies and/or delivering …

Introduction: The key step in changing health behavior is understanding why users continue
to use fitness apps. Therefore, we intend to investigate the users' intention to continue using …

Background Despite many health benefits of physical activity, nearly a third of the world's
adult population is insufficiently active. Technological interventions, such as mobile apps …

Social comparison-based features are widely used in social computing apps. However, most
existing apps are not grounded in social comparison theories and do not consider individual …

In today's connected society, many people rely on mHealth and self-tracking (ST) technology
to help them adopt healthier habits with a focus on breaking their sedentary lifestyle and …

Women in midlife experience health risks that could be mitigated by regular physical activity
and reduced sedentary time, but this population rarely achieves physical activity levels that …

Wearable physical activity (PA) tracking technology, which has the capacity to connect users'
PA data to online social networks, could address the need for cost-effective, scalable PA …

Background: Women in midlife are vulnerable to developing cardiovascular disease,
particularly those who have conditions such as hypertension. Physical activity (PA) can …