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;Direct contactMoist heat therapy has been believed to be more effective at warming tissues than dry heat, because water transfers heat more quickly than air. Frequent use of saunas has been linked to a lower risk of vascular disease. Clinical studies do not support the popular belief that moist heat is more effective than dry heat. Moist heat results in the perception that the tissue is heated more deeply. In fact, recent studies indicate that vasodilation, the expansion of the blood capillaries (vessels) to allow more