# @akimapnea on Instagram

- **Type:** Video
- **Original URL:** https://www.instagram.com/p/DeScdRvMT6y
- **Gondola URL:** https://gondola.cc/posts/71603973-akimapnea-instagram
- **Thumbnail:** https://img.gondola.cc/tr:w-,h-,fo-auto/postThumbnails/ba59a1a643.jpg
- **Posted:** 2026-10-09T21:15:33.000+00:00
- **Account Owner:** Akim Adhari (@akimapnea) — https://gondola.cc/akimapnea

## Caption

🫁⚠️ LUNG SQUEEZE: WHAT REALLY HAPPENS TO YOUR LUNGS DURING DEEP FREEDIVING?

Did you know that at 30 metres, your lung gas volume is reduced to approximately 25% of its surface volume? 😳

🌊 1️⃣ LUNG COMPRESSION

As we descend, water pressure increases, compressing the air inside our lungs and millions of tiny alveoli responsible for gas exchange.

At 10m → 50% of surface lung gas volume
At 20m → 33%
At 30m → 25%
At 40m → 20%

🩸 2️⃣ BLOOD SHIFT

As the lungs compress, blood volume increases in the pulmonary circulation, helping compensate for the loss of gas volume.

This remarkable physiological adaptation allows freedivers to reach depths previously considered impossible.

⚠️ 3️⃣ WHEN DOES LUNG SQUEEZE OCCUR?

When pressure-related mechanical stress exceeds the tolerance of lung tissues, the delicate alveolar-capillary membrane can become damaged.

This can lead to:

🔴 Fluid leaking into the alveoli
🔴 Small blood vessel injuries
🔴 Pulmonary bleeding
🔴 Reduced oxygen exchange

🧘 4️⃣ WHAT INCREASES THE RISK?

❌ Excessive diaphragm contractions
❌ Sudden movements and stretching at depth
❌ Poor relaxation and unnecessary muscle tension
❌ Aggressive equalisation
❌ Progressing too quickly into deeper dives
❌ Insufficient recovery

🚨 5️⃣ WARNING SIGNS

Coughing, blood in saliva, chest tightness, breathing difficulty or unusual fatigue after a dive can indicate a lung injury.

Not every lung squeeze produces visible blood.

If symptoms appear, stop diving and seek medical assessment. Breathing difficulties or coughing blood require urgent attention.

🎓 THE MOST IMPORTANT LESSON

Going deeper isn’t simply about holding your breath longer.

It’s about understanding pressure, lung compression, blood shift and the physiological limits of your body.

Even experienced freedivers are not immune to lung squeeze.

💬 Have you ever experienced a lung squeeze? At what depth?

👇 Share your experience in the comments.

📌 Save this post and share it with your dive buddy!

#Freediving #LungSqueeze #DeepFreediving #FreedivingSafety #BloodShift

## Stats

- **Views:** 13,361
- **Likes:** 261
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- **Comments:** 3

## Credits

No public credits are recorded here. This does not identify who made the post.

## Tags

deepfreediving, bloodshift, freediving, freedivingsafety, lungsqueeze

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