No-limits apnea

No-limit apnea is a discipline of competitive freediving, also known as competitive apnea, in which the freediver descends and ascends with the method of his or her choice. Often, a heavy metal bar or "sled" grasped by the diver descends fixed to a line, reaching great depths. The most common ascension assistance is via inflatable lifting bags or vests with inflatable compartments, which allow for rapid surfacing. The dives may be performed head-first or feet-first.

This form of diving is considered extremely dangerous by diving professionals. No-limit apnea has claimed the lives of several divers. In 2025 the discipline is not recognized by either AIDA or CMAS.

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