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From Fellrnr.com, Running tips
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[[File:DIY Altitude Training.JPG|none|thumb|800px]]
* '''Hypoxicator'''. You will need to build a hypoxicator, which is detailed under [[DIY Hypoxicator]]. This is the only bit of fabrication you'll need to do. This should only cost around $20 or so to build.
* '''CO2 Scrubber'''. As detailed in the [[DIY Hypoxicator]] instructions, the The CO2 scrubber is a consumable, so buy enough to last you for a few weeks. I typically buy 3-5 bags at a time. See [[DIY Hypoxicator]] for details on the CO2 scrubber and where to buy it.
* '''Pulse Oximeter'''. To monitor and control your altitude training, and to keep you safe, you need to measure your [[SpO2|SpO<sub>2</sub>]] with a [[Pulse Oximeter]]. You can get a good one for about $35, or one with a PC interface for recording and analysis with the [[Hypoxic Timer]] software for $85. Using this system without a [[Pulse Oximeter]] is dangerous as you may drop your [[SpO2|SpO<sub>2</sub>]] too low.
* '''Timer'''. You will need to time your hypoxic and recovery periods, either with a simple countdown timer or with some software like the [[Hypoxic Timer]] .
