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From Fellrnr.com, Running tips
→Using the hypoxic timer
# Start the hypoxic timer software.
# Click on the options button to set your preferences. The software will remember your preferences, so you only need to do this once. The preferences that affect the overall length of time will not update the graphs on the main page until the next restart.
# Make sure the [[Pulse Oximeter]] is connected to the computer and is reading your heart rate and [[SpO2|SpO<sub>2</sub> ]] correctly.# Click the button marked "use pulse oximeter". You should see your heart rate and [[SpO2 |SpO<sub>2</sub>]] displayed on the main page.
# Click the start button. The software will remind you when it is time to start and stop the hypoxia.
[[File:HypoxicTimer.jpg|none|thumb|500px| A screenshot of the hypoxic timer.]]