Stress fractures, tendonitis or plantar fasciitis, a hard-to-heal tissue inflammation that feels like needles driven into your foot, are likely to result for runners who dash out the gate barefoot without gradually working up to it.

CNN: Running debate: Bare or in shoes?

The aim of the trial was to see if it made the women's breasts easier to examine in mammograms because young women's breast tissue is dense, making it hard for X-rays to pick up tumours.

BBC: Hormone spray 'could stop cancer'