What is the hazard of holding your breath while ascending?

Lung over-expansion and rupture.

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  1. Weight loss
  2. Lung over-expansion and rupture ✔
  3. Mask fogging

Why: Gas expands as you ascend, so holding your breath can over-expand lungs and cause serious injury.

Huh, didn't know that: Gas expands as you ascend, so holding your breath can over-expand lungs and cause serious injury.

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Let it out before you go up.
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References

Answer: Lung over-expansion and rupture. Gas expands as you ascend, so holding your breath can over-expand lungs and cause serious injury.

  1. Scuba diving en.wikipedia.org/wiki/Scuba_diving
    the expansion of gas in the lungs could over-expand the lung air spaces and rupture the alveoli
    Checked 2026-11-07.

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