Breathing Rate — What It Is and Why It Matters
Breathing rate in diving refers to how much gas a diver consumes per minute, typically measured as respiratory minute volume (RMV) in liters per minute at the surface. A relaxed recreational diver might consume 12 to 18 liters per minute, while a stressed or working diver can consume 25 to 30 liters per minute or more.
At depth, the actual gas consumed from the tank increases proportionally with ambient pressure — 15 liters per minute of surface-equivalent consumption at 20 meters (3 ATA) draws 45 liters per minute from the tank. Air-integrated dive computers use breathing rate data to calculate air time remaining (ATR) at your current depth and consumption rate.
Frequently Asked Questions
How can I reduce my breathing rate while diving?
Practice relaxation techniques, improve buoyancy control to reduce exertion, swim slowly with efficient fin kicks, and manage stress. Experienced divers typically consume significantly less gas than beginners because of better buoyancy and comfort underwater.
What is a good breathing rate for a diver?
An RMV of 12 to 18 liters per minute at the surface is considered good for recreational divers. Experienced divers may achieve 10 to 14 liters per minute. High consumption (over 20 liters per minute) is common for beginners and improves with experience.
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