With around a third of the population now owning fitness trackers, Britain has become a nation obsessed with tracking its every move.Hannah Fry finds out how 1970s car crashes helped us to count our steps, why high-altitude WWII dog-fights led to a crucial health monitor and how fitness trackers are even being used to catch killers. |
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Title: | Fitness Tracker | |
Air Date: | December 8, 2022 | |
Runtime: | 60 min | |
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