Research on exercise in cold water, part of an assessment of exercise regimes for victims of multiple scerlosis (MS). Here, at the University of Minnesota Hypothermia laboratory in Duluth, a volunteer rides an exercise bicycle whilst immersed in cold water at a temperature of 50 degrees Fahrenheit. A variety of probes measure his vital functions, skin & core body temperatures. The tube connected to his mouth delivers a monitored air supply. People afflicted by MS need regular exercise, but the rise in body temperature this provokes often causes uncontrollable shaking. Exercise in cold water helps counter this effect.

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