Rule #10: Ignore the above advice; the guy knows nothing. Aspirin, for example, does not "thin" blood, it reduces platelet aggregation, which has NOTHING to do with blood penetrating virtually all tissues. Growth hormone is largely released during stages 3 and 4 of sleep, so the only thing the sauna will do is cause peripheral vasodilation (how the body rids itself of heat) which means LESS circulation to your muscles as you exercise. Brilliant. And no, the body doesn't send more blood to iced areas to warm them; the body interprets the ice as a freezing ambient temperature and shunts blood AWAY from the area to prevent body heat loss. The OP has a very poor grasp of physiology, it seems.