Why You Can’t Hold Your Breath While Scuba Diving?
- Scuba Divers Breathe Compressed Air
When scuba diving, you breathe air from a tank under pressure. As you go deeper underwater, water pressure increases around your body and lungs.
- Air Expands While Ascending
As you rise toward the surface, surrounding pressure decreases. This causes the air inside your lungs to expand naturally.
- Holding Your Breath Can Be Dangerous
If you hold your breath during ascent, the expanding air gets trapped inside your lungs. This can cause:
- Lung overexpansion injury
- Torn lung tissue
- Air bubbles in the bloodstream
- Even shallow water can be risky if breathing stops.
- Divers Must Breathe Continuously
That’s why scuba instructors teach divers to:
- Breathe slowly
- Stay relaxed
- Never skip breathing underwater
The golden rule is:
“Always breathe — never hold your breath.”
- Simple Science Example
Think of a packet of chips inside an airplane. As pressure changes, the packet expands. Your lungs behave similarly underwater.
- The Good News
Scuba diving is very safe when proper breathing techniques are followed. Beginner divers are always guided closely by certified instructors underwater.