Your Body, Their Data (opens in new tab)

Every morning, roughly 62 million Americans strap on a fitness tracker, open a wellness app, or tap through a mood journal before their first cup of coffee. They log sleep scores, heart rate variability, menstrual cycles, calorie counts, and anxiety levels with the casual ease of checking the weather. In the United Kingdom, 35 per cent of the population now owns and regularly uses a wearable health tracker, an 80 per cent increase from 2019 usage levels. The implicit bargain feels simple enou...