Cold immersion and swimming.
D000273:Adipose Tissue; D003020:Clothing; D003080:Cold Temperature; D003645:Death, Sudden; D004106:Dilatation; D005615:Freezing; D006801:Humans; D007101:Immersion; D005082:Physical Exertion; D012867:Skin / Q000098:blood supply; D013534:Survival; D013550:Swimming