The Altitude Centre - Introducing the Sierra 100. The Sierra provides a @ hypoxico quality, yet affordable alternative to the Everest Summit II altitude generator. Here's The Altitude Centre client @rikkiwilton at home
![Training High: Endurance Sports and Hypoxic Altitude Training - Trail And Ultra RunningTrail And Ultra Running Training High: Endurance Sports and Hypoxic Altitude Training - Trail And Ultra RunningTrail And Ultra Running](http://trailandultrarunning.com/wp-content/uploads/2012/07/IMG_0357-1024x682.jpg)
Training High: Endurance Sports and Hypoxic Altitude Training - Trail And Ultra RunningTrail And Ultra Running
![Sleeping at 15,000ft: Hypoxico Altitude Training: Part 1 - Trail And Ultra RunningTrail And Ultra Running Sleeping at 15,000ft: Hypoxico Altitude Training: Part 1 - Trail And Ultra RunningTrail And Ultra Running](http://trailandultrarunning.com/wp-content/uploads/2012/05/IMG_0360.jpg)