Dive in! The benefits of cold water swimming

Every morning - when not in lockdown level four - Grant Schofield and his dog Bluey, head down to their local beach in Auckland for a swim. It's their year-round daily ritual, winter or summer, and they're among growing movement of people who swear by the physiological and mental effects of cold water swimming. Grant is a Professor of Public Health at Auckland University of Technology and director of the university's Human Potential Centre. His research areas are wellbeing and chronic disease prevention. He says taking a cold dip is like upgrading your brain.