Are waist trainers really worth it?

Waist trainers claim to reduce your natural waist size and emphasize a woman’s curves. Although they have grown in popularity amongst the fitness community, waist trainers have faced a lot of criticism. So how different are they to traditional corsets? And why are women’s waists still so politicised? Jane Garvey discusses with fitness trainer Kelechi Okafor and dress historian Lucy Adlington.