Mask allows athletes to simulate high altitude training

Name: Mask allows athletes to simulate high altitude training
Uploaded: 2015-01-02T07:30:57-08:00
Duration: 85 s
Description: This year, one of the hottest pieces of sports equipment is a high altitude training mask. The mask makes it harder to breathe, so that athletes can simulate what it's like exercising at high altitudes. Kris Van Cleave looks into the science behind the mask.