Cosmos journalist Matthew Ward Agius loves his new fitness tracker.  But is it making him healthier? Will he stick with it? And how do fitness trackers know so much data about you?

In this episode, Matthew is joined by Dr Ty Ferguson and Professor Deborah Lupton, to investigate fitness trackers, and find out the truth behind the technology.

This episode was produced by Jacinta Bowler and edited by Helen Karakulak. Theme music by Will Berryman.

For more science news, visit cosmosmagazine.com and follow us on Instagram @cosmosmagazine

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