A. glance at Claudia Hammond’s The Art of Rest – and a skim of her chapter headings – might fool you into thinking that rest is a simple subject. The Art of Rest draws on ground-breaking research Claudia Hammond collaborated on - 'The Rest Test' - the largest global survey into rest ever undertaken, which was completed by 18,000 people across 135 different countries. ... Claudia’s latest book, The Art of Rest, examines the science behind our struggles for rest and relaxation in the 21st century, drawing on the results of ground-breaking research carried out in 135 different countries. The Art of Rest draws on ground-breaking research Claudia Hammond collaborated on – ‘The Rest Test’ – the largest global survey into rest ever undertaken, which 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. Claudia Hammond is an award-winning broadcaster, author and psychology lecturer. The Art of Rest draws on ground-breaking research Claudia Hammond collaborated on – ‘The Rest Test’ – the largest global survey into rest ever undertaken, which was completed by 18,000 people across 135 different countries.