Dynamic apnea
freediving disciplines where the breath-hold diver swims horizontally under water with or without fins
Dynamic apnea is a discipline in competitive freediving in which athletes swim horizontally underwater on a single breath, aiming to cover the greatest possible distance. Performances take place in swimming pools and are governed by organizations such as AIDA International and the Confédération Mondiale des Activités Subaquatiques (CMAS).
Disciplines
Dynamic apnea includes three competitive disciplines recognized under both AIDA and CMAS rules:
Dynamic apnea without fins (DNF) – the athlete swims using a modified breaststroke technique without fins.
Dynamic apnea with fins (DYN) – the athlete uses a monofin or similar fin setup.
Dynamic apnea with bifins (DYNB or DYN BF) – the athlete uses a pair of standard fins.
These disciplines are distinct from other competitive freediving categories, which include:
Static apnea (STA), No-limits apnea (NLT), Variable weight apnea (VWT), Free immersion (FIM), Constant weight apnea (CWT), Constant weight without fins (CNF), and constant weight bi-fins (CWTB).
Rules and Judging
All dynamic apnea events are performed in a horizontal position on a single breath-hold, without propulsion assistance from any static surface - except during turns, where pushing off the pool wall is allowed. Valid performances must take place in certified swimming pools at least 25 metres in length, with both the start and end of the dive occurring within the pool. Performances are measured by the horizontal distance swum underwater.
To validate an attempt, the diver must resurface and complete the surface protocol, which includes removing facial equipment and giving an "OK" sign within 15 seconds of surfacing.
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