In a weird exercise females performs 'Naked Yoga classes' in London recently. The practice of naked yoga, or "nagna" yoga, has been around since ancient times and is still practised by religious figures in India. In the 1960s, it became popular among followers of the hippie movement in the US. And now it's making a splash due to mixed-gender classes becoming popular in cities such as New York and LA. In London, it's still very much a man's club, with all-male classes run by YogaNu and Altogether Yoga in London. Annette's mixed-gender class at Naked Yoga London is the only one of its kind in the whole of the UK. Nudity isn't essential at Naked Yoga London, unlike at some other centres.