Altitude mask on dead Norwegian biathlon competitor wasn't part of federation's training program

The Norwegian Biathlon Association says the performance-enhancing altitude mask that Olympic hopeful Sivert Guttorm Bakken was wearing when he was found dead this week is not part of its ...
Medscape

Hypoxic Masks Raise Cardiac Safety Questions in Athletes

The death of a young biathlete has refocused attention on hypoxic training masks, especially their cardiovascular effects, in ...