Carol Torgan, a health science strategist, points out that anyone who makes note of their blood pressure, weight, or menstrual cycle could be categorized as a “self-tracker.”¹⁰ Add an online component, and you have the ingredients for a social health application or an electronic health record. Our survey finds that 15% of internet users have tracked their weight, diet, or exercise routine online. In addition, 17% of internet users have tracked any other health indicators or symptoms online.  Fully 27% of adult internet users say yes to either question.

Wireless users are more likely than other internet users to track health data online. Eighteen percent of wireless users have tracked their weight, diet, or exercise routine online, compared with 9% of internet users who do not have a wireless-enabled laptop or other device. Nineteen percent of wireless users have tracked any other health indicators or symptoms online, compared with 11% of non-wireless internet users.

Separately, looking just at the 85% of adults who own a cell phone, 9% say they have software applications or "apps" on their phones that help them track or manage their health.