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Bode Miller of the US skis over the 'Bear's brow' jump during the second training at the men's World Cup downhill event on February 9, 2012 at the Rosa Khutor mountain resort in Krasnaya Polyana, near Sochi. - 

Have you ever heard the phrase “live high, train low”? It’s part of the strategy employed by a U.S. Olympic Ski Team about to head to Sochi for the games. The idea is to acclimate the body to an altitude with less oxygen, which can boost performance. Today, on the second conversation in our sports and tech series "Gaming the System," Marketplace Tech talks with Jim Stray-Gundersen, who advises Team USA and pumps nitrogen into athletes’ bedrooms so they can live high and train low. Click the audio player above to listen to the interview.

Follow Ben Johnson at @@TheBrockJohnson