The Art of Rest draws on ground-breaking research Claudia Hammond collaborated on - 'The Rest Test' - the largest global survey into rest ever undertaken. It was completed by 18,000 people across 135 different countries. Much of value has been written about sleep, but rest is different; it is how we unwind, calm our minds and recharge our bodies. And, as the survey revealed, how much rest you get is directly linked to your sense of well-being.

Claudia Hammond is an award-winning writer and broadcaster and Visiting Professor in the Public Understanding of Psychology at the University of Sussex. As the presenter of All in the Mind she is BBC Radio 4's voice of psychology and mental health.