Stress doesn’t only affect your mind… it drains your oxygen. Before a breath-hold or dive, your performance is already being decided on the surface. Most beginners think oxygen is only in the lungs. But during apnea, your real oxygen reserve is stored in three places: 🫁 Lungs (Air Reserve) – ~30% 🩸 Blood (Hemoglobin) – ~60% 💪 Muscles (Myoglobin) – ~10–15% ⸻ 🛑 What Happens Under Stress? – Oxygen Drain When you are tense, anxious, or overthinking on the surface: • 🧠 Brain uses more oxygen (thinking, fear) • ❤️ Heart rate rises → burns more O₂ • 💪 Muscles (arms, legs, back) activate → steal O₂ early 👉 You can lose up to 30% of your oxygen before even starting your dive. ⸻ ✅ What Happens When Relaxed? – Oxygen Saved • Lower heart rate • Quiet brain activity • Muscles fully off • Blood stays oxygen-rich Relaxation doesn’t add oxygen… it protects it. That’s why a calm diver can double their performance. ⸻ 🎯 KEY LESSON Static and deep diving don’t start underwater. ...