'Paying to stay safe': why women don't walk as much as men

A study shows in most countries, women walk significantly fewer steps each day than men. Talia Shadwell hears from people all over the world saying the same thing: it's down to personal safety, not laziness

Vivi Restuviani would try to make herself look as invisible as possible when she was out at night in her former hometown of Semarang, Indonesia. "If you looked at me from behind, you'd probably have thought I was a boy," she says.

One night, Restuviani was taking her regular short walk home, swamped anonymously in an oversized hooded sweater. As she walked along the main drag, she heard a motorbike approach; suddenly its rider was in her face.