Some believe that today's young and tech-savvy generation will eagerly adopt the latest health tracking technologies. However, we know little about the tracking practices of young adults, and in particular how they use technologies to journal their daily fitness activities and diet. Drawing from practice theory, this study uses Savolainen's concept of information practice to examine the life contexts of users (e.g., personal goals and habits) that influence the use of health tracking technologies. Through interviews with thirteen college students, we identify the information practices that young adults perform to track their health and diet, outlining how different information practices exhibit different levels of reliance on technology. Life contexts may help explain why our young adults preferred 'traditional' technologies like paper for some information practices. Further we suggest that the design of future health-tracking technologies need to holistically consider the interwoven nature of information practices, life contexts, and tracking technologies.