When you buy through our links, Insider may earn an affiliate commission. Learn more

Graphic of a fitness tracker next to an image of a glucose monitor on someone's arm, with lines of heart rate readings in the background.

Knowledge is power, the saying goes, so you may be tempted to use wearables to track your health data in the hopes of preventing or managing an illness or hitting certain fitness goals.

You'd be joining the millions of others seduced by the idea that more data will mean better health, as the global fitness tracking industry is estimated to be worth over $74 billion in 2024, up from $46 billion in 2020, according to Statista.