The negative feedback from your fitness tracker could be affecting your mental and physical health. Scientists call this phenomenon - the nocebo effect. Palki Sharma tells you whether it's time to rethink fitness gears.

Gravitas: The problem with fitness trackers

Amazon.com on Thursday (August 27) launched fitness band and app "Halo" as the e-commerce giant looks to take on Apple, Fitbit and Samsung in an increasingly crowded fitness tracker market.

Amazon launches its first fitness band in bid to take on Fitbit, others

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