Demonstrate

The fatigue that Ryu's body had been experiencing seem to have vanished with the wind, somewhat ironically. As though someone had taken hold of his lungs and breathed life into them, they suddenly expanded. At the same time, his heartbeat became exceptionally slow, beating just a single time per several minutes. And yet, that single pump filled him with so much vitality that even his veins themselves seemed to glow. 

The moment this occurred, the snow that had piled onto Ryu began to melt purely as a result of his body's heat, pooling into a small pond of steam as he lightly snored, oblivious to the world. He floated face down within the pool, his clothes having vanished without him conscious to maintain them. His lungs were so powerful that the pair even pumped water in and out without a single sign of Ryu drowning. One would have thought he had a pair of gills instead.