This presentation reviews the function of cardiovascular regulation in cold environment. The main hemodynamic effects of cold exposure are skin vasoconstriction, elevation in blood pressure and centralisation of circulating blood volume. The hemodynamic effects of acute and chronic cold exposure are discussed as well as the role of habituation in repeated cold exposures. Also the differences between skin and whole body cooling are considered. The roles of central and local circulatory regulation mechanisms in responses to cold exposure are reviewed, including autonomic nervous system, renin-angiotensin-system, nitric oxide, endothelin system, arginine vasopressin, corticotrophin releasing factor, and adrenocorticotrophin hormone. The interplay between the different regulatory mechanisms is also discussed.