The Finns have pretty much institutionalized extreme winter swimming and the better swimming holes have been modified accordingly to make the experience as safe as possible. Heaters and pumps, for example, are often installed to keep ice off of paths, piers and ladders. The more impromptu mass Polar Bear Swims that have become popular recently are another story – be sure to bring thick woolen socks or neoprene beach shoes to help cope with slippery conditions on the ground.
Though those who partake in Polar Bear Swims and other extreme winter swimming events almost universally declare the experience both healthful and life-affirming, people with certain types of health issues including a history of heart disease or who may suffer from either low or high blood pressure are strongly advised to consult their personal physician before indulging in winter swimming. Swimming with the polar bears is one thing; “swimming with the fishes” is quite another.

