Under affecting sauna hot improves metabolism. And this is,like hot oven, and in mud oven fire burns bad, but

 if cleans oven, rise air flow, an oven burns better. And same with sauna with a sweat from organism removing toxic substances, as destroying on metabolism. Metabolism is a base for our life.

 Affecting high of warm lead to temperature rising a body, rising blood circulation, and blood carries new oxygen portion, stimulating protein synthesis and removing from organism products for burning. Elast and tight skin depends on from a quality, and quantity collagen tissues, but collagen too protein. Muscles, tensions, cartilages, are    containing of protein. Ageing organism happening of protein connections blocking with slags, which blocking cells, and interferes for metabolism processes. Thus    comparison with blockage cells here are true.As of contrast procedures is of affecting cold,  improving therm regulation, an here burning much  quantities for fats, carbohydrates.And  in result if not addicted using cold organism fighting  abundant fat.If   cold procedure will continuate    ,   this leading to the high fats synthesis. Thus in winter peoples are having true dense  body .