Could cold water dipping help to tackle PTSD?

Research is being carried to look at the science behind the theory that taking an ice-cold dip can help tackle post-traumatic stress disorder (PTSD).

Figures suggest that about one in 10 people in the UK will experience PTSD, which can be caused by car crashes, violent assaults, health problems and conflict.

Researchers will test swimmers' saliva to track cortisol levels - a stress-related hormone - before and after cold water immersion.

Denise Hill, who is leading the study, said her research was a UK first and wanted to test if cold water dipping could be used as a "supplementary" treatment for people with PTSD alongside talking therapy and medication.