Can You Get the Bends Freediving? Decompression and Freediving Risk

The short answer: yes, but the risk is more specific and less common than most people assume. Decompression sickness (DCS) — the bends — is caused by nitrogen bubbles forming in the blood and tissues when a diver ascends too quickly after accumulating nitrogen under pressure.

When you descend on a single breath, the air in your lungs compresses under pressure. Nitrogen from that compressed air diffuses into your blood and tissues — just as it does in scuba diving. On ascent, as pressure decreases, that dissolved nitrogen off-gasses back out.

On a single recreational freedive:

• The amount of nitrogen absorbed is small
• You're down for 1–3 minutes
• The body clears the nitrogen on the ascent and surface interval
• Single recreational dives to modest depths carry negligible DCS risk

The risk changes with repetitive deep dives.

During a long freediving session — 3–4 hours with many dives to significant depth — nitrogen accumulates across dives. Each dive adds more dissolved nitrogen before the previous load has fully off-gassed.

Researchers have documented measurable nitrogen accumulation in freedivers after extended sessions, and verified DCS cases in competitive freediving athletes doing many repetitive dives to 20–40m with short surface intervals.

Who is most at risk

• Competitive depth divers doing 30, 50, 100+ dives per day in training
• Spearfishers making many repetitive dives over 4+ hour sessions
• Divers combining freediving and scuba in the same day

Recreational freedivers doing 5–10 leisure dives are in a different risk category.

Taravana is a syndrome historically documented among pearl divers in Polynesia who performed extremely repetitive deep dives over many hours — 50–60 dives per day over 4–6 hour sessions.

Symptoms include dizziness, paralysis, loss of consciousness, and death. The mechanism involves nitrogen narcosis and arterial gas embolism rather than classical DCS.

Taravana is not a risk for casual recreational freediving — but it illustrates the genuine DCS potential in repetitive breath-hold diving at high frequency.

These are frequently confused. They are not the same thing.

Follow the 1:2 ratio

if your dive was 2 minutes, rest at least 4 minutes before the next one

Limit session length

extended sessions at significant depth accumulate risk — taking a break or ending earlier reduces cumulative nitrogen exposure

Ascend slowly

a controlled ascent allows gradual pressure reduction and nitrogen off-gassing

Avoid scuba after freediving

standard recommendation is a 12-hour gap — combining both in the same day multiplies nitrogen exposure

Know the symptoms

joint pain, skin mottling, dizziness, or neurological symptoms after a session warrant emergency medical evaluation

DCS is treatable with hyperbaric oxygen therapy — but only if caught promptly. The more immediate risk for most freedivers is shallow water blackout, caused by oxygen depletion rather than nitrogen accumulation.