#BBCtrending: Can you train your waistline?

A trend for 'waist training' has become a regular and controversial talking point on social media sites like Instagram.

Waist training involves wearing a device made from tight material - think of a modern-day, gym-friendly version a Victorian corset - for long periods of time in the hope of changing the body. Hundreds of thousands of people have been sharing their experiences of waist trainers online, but there's also been a backlash against them.

So what are they? And could they be harmful?

Reporter: Anne-Marie Tomchak

Video journalist: Neil Meads

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