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The same has happened to the "altitude tent", developed by AIS to replicate the effect of altitude training at sea level.

“高原帐篷”也是如此，这是澳大利亚体育学院为了模仿在海平面高度地点的训练效果而设计研发的。

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The air pressure in a plane during flight is lower than at sea level.

VOA: special.2009.07.14

It doesnt matter whether they are at great elevation or at sea level. John Geiger suggests that the brains effort to create a Third Man is not an accident of human brain structure, or a sign of injury in extreme conditions.

VOA: special.2010.02.24

It ends at the Dead Sea, the lowest point on Earth, four hundred meters below the level of the Mediterranean Sea.

VOA: special.2009.05.18

Currently, the group is in Oregon testing 24 healthy volunteers at sea level.

WSJ: Mayo Clinic Researchers on Everest Study High Altitude's Effects on the Body

Venice is all about the water, and what better way to truly experience it than at sea level, with an expert guide?

FORBES: Hotels I Love: Cipriani, The Best Of Venice

Most of the track would need to sit at sea level, but the exit point would have to be about 12 miles in the air.

FORBES: Connect