Could exercising in frigid temperatures make us healthier?

Winter swimmers enjoyed an icy dip in Poland's Garczyn lake last February. Recorded air temperature was around 14 degrees Farenheit, and a large ice hole had to be cut to allow the lake bathing.
Winter swimmers enjoyed an icy dip in Poland's Garczyn lake last February. Recorded air temperature was around 14 degrees Farenheit, and a large ice hole had to be cut to allow the lake bathing.