Some Athletes Experience a Larger-Than-Expected Decrease in VO₂ Max When

question 29

Multiple Choice

Some athletes experience a larger-than-expected decrease in VO₂ max when tested at altitude. This may be due to

• A) a larger desaturation of hemoglobin.
• B) a greater decrease in maximal heart rate.
• C) a greater decrease in maximal stroke volume.
• D) poor mitochondrial function.

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Definitions:

Eruption Column

A rising column of hot gases, tephra, and rock fragments that erupts high into the atmosphere.

Pyroclastic Flow

A fast-moving cloud of hot volcanic gases, ash, pumice, and rock fragments that generally travel down the flanks of a volcano; synonym: ash flow.

Volcanic Dome

A round-shaped mound formed over a volcanic vent by the slow eruption of viscous lava.

Mount St. Helens

An active stratovolcano located in the state of Washington, USA, known for its catastrophic eruption in 1980.