Social change produces alterations in society that necessitate changes in sociological theories. Two significant changes affecting health lifestyle theory are the behaviors associated with the COVID-19 pandemic and the digitalization of society. The health-protective practices emerging from the ongoing pandemic and the recent parade of other newly emerging infectious diseases need to be included in the theory's framework. Moreover, the extensive digitalization of today's society leads to the addition of connectivities (electronic networks) as a structural variable. Connectivities serve as a computational authority influencing health lifestyle practices through health apps and other digital resources in contrast to collectivities (human social networks) as a normative authority. The recent literature supporting these features in an updated and expanded model of health lifestyle theory is discussed.
Keywords: COVID-19; digitalization; health lifestyles; infectious diseases.