Freediving (or free-diving) is a form of underwater diving that does not involve the use of scuba gear or other external breathing devices, but rather relies on a diver's ability to hold his or her breath until resurfacing. Examples include breath-hold spear fishing, freedive photography, apnea competitions, and to some degree, snorkeling. The activity that garners the most public attention is the extreme sport of competitive apnea in which competitors attempt to attain great depths, times, or distances on a single breath.

Dynamic Apnea covers two of the eight categories recognised by the International Association for the Development of Freediving. That of Dynamic Without Fins and Dynamic With Fins. Both disciplines require breath held dives where the diver travels in a horizontal position under water under their own power without aid/physical contact of a static surface, with the exception of the pool wall when done indoors. The records can only be recognized in pools of 25m or greater.

The other categories recognized are: static Apnea, No Limit, Variable Weight, Free Immersion, Constant Weight, Constant Weight Without Fins,